Cyclopentyl acids as lpa antagonists

ABSTRACT

The present invention provides compounds of Formula (I) or a stereoisomer, tautomer, or pharmaceutically acceptable salt or solvate thereof, wherein all the variables are as defined herein. These compounds are selective LPA receptor inhibitors.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of U.S. ProvisionalApplication No. 62/732,590, filed Sep. 18, 2018; the entire content ofwhich is herein incorporated by reference.

FIELD OF THE INVENTION

The present invention relates to novel substituted cyclopentyl acidcompounds, compositions containing them, and methods of using them, forexample, for the treatment of disorders associated with one or more ofthe lysophosphatidic acid (LPA) receptors.

BACKGROUND OF THE INVENTION

Lysophospholipids are membrane-derived bioactive lipid mediators, ofwhich one of the most medically important is lysophosphatidic acid(LPA). LPA is not a single molecular entity but a collection ofendogenous structural variants with fatty acids of varied lengths anddegrees of saturation (Fujiwara et al., J Biol. Chem., 2005, 280,35038-35050). The structural backbone of the LPAs is derived fromglycerol-based phospholipids such as phosphatidylcholine (PC) orphosphatidic acid (PA).

The LPAs are bioactive lipids (signaling lipids) that regulate variouscellular signaling pathways by binding to the same class of7-transmembrane domain G protein-coupled (GPCR) receptors (Chun, J.,Hla, T., Spiegel, S., Moolenaar, W., Editors, LysophospholipidReceptors: Signaling and Biochemistry, 2013, Wiley; ISBN.978-0-470-56905-4 & Zhao, Y. et al, Biochim. Biophys. Acta (BBA)-Mol.Cell Biol. Of Lipids, 2013, 1831, 86-92). The currently known LPAreceptors are designated as LPA₁, LPA₂, LPA₃, LPA₄, LPA₅ and LPA₆ (Choi,J. W., Annu. Rev. Pharmacol. Toxicol., 2010, 50, 157-186; Kihara, Y., etal, Br. J. Pharmacol., 2014, 171, 3575-3594).

The LPAs have long been known as precursors of phospholipid biosynthesisin both eukaryotic and prokaryotic cells, but the LPAs have emerged onlyrecently as signaling molecules that are rapidly produced and releasedby activated cells, notably platelets, to influence target cells byacting on specific cell-surface receptors (see, e.g., Moolenaar et al.,BioEssays, 2004, 26, 870-881, and van Leewen et al., Biochem. Soc.Trans., 2003, 31, 1209-1212). Besides being synthesized and processed tomore complex phospholipids in the endoplasmic reticulum, LPAs can begenerated through the hydrolysis of pre-existing phospholipids followingcell activation; for example, the sn-2 position is commonly missing afatty acid residue due to deacylation, leaving only the sn-1 hydroxylesterified to a fatty acid. Moreover, a key enzyme in the production ofLPA, autotaxin (lysoPLD/NPP2), may be the product of an oncogene, asmany tumor types up-regulate autotaxin (Brindley, D., J. Cell Biochem.2004, 92, 900-12). The concentrations of LPAs in human plasma & serum aswell as human bronchoalveolar lavage fluid (BALF) have been reported,including determinations made using sensitive and specific LC/MS &LC/MS/MS procedures (Baker et al. Anal. Biochem., 2001, 292, 287-295;Onorato et al., J. Lipid Res., 2014, 55, 1784-1796).

LPA influences a wide range of biological responses, ranging frominduction of cell proliferation, stimulation of cell migration andneurite retraction, gap junction closure, and even slime mold chemotaxis(Goetzl, et al., Scientific World J., 2002, 2, 324-338; Chun, J., Hla,T., Spiegel, S., Moolenaar, W., Editors, Lysophospholipid Receptors:Signaling and Biochemistry, 2013, Wiley; ISBN: 978-0-470-56905-4). Thebody of knowledge about the biology of LPA continues to grow as more andmore cellular systems are tested for LPA responsiveness. For instance,it is now known that, in addition to stimulating cell growth andproliferation, LPAs promote cellular tension and cell-surfacefibronectin binding, which are important events in wound repair andregeneration (Moolenaar et al., BioEssays, 2004, 26, 870-881). Recently,anti-apoptotic activity has also been ascribed to LPA, and it hasrecently been reported that PPARγ is a receptor/target for LPA (Simon etal., J. Biol. Chem., 2005, 280, 14656-14662).

Fibrosis is the result of an uncontrolled tissue healing process leadingto excessive accumulation and insufficient resorption of extracellularmatrix (ECM) which ultimately results in end-organ failure (Rockey, D.C., et al., New Engl. J. Med., 2015, 372, 1138-1149). Recently it wasreported that the LPA1 receptor was over-expressed in idiopathicpulmonary fibrosis (IPF) patients. LPA₁ receptor knockout mice were alsoprotected from bleomycin-induced lung fibrosis (Tager et al., NatureMed., 2008, 14, 45-54). LPA pathway inhibitors (e.g. an LPA₁ antagonist)were recently shown to be chemopreventive anti-fibrotic agents in thetreatment of hepatocellular carcinoma in a rat model (Nakagawa et al.,Cancer Cell, 2016, 30, 879-890).

Thus, antagonizing the LPA₁ receptor may be useful for the treatment offibrosis such as pulmonary fibrosis, hepatic fibrosis, renal fibrosis,arterial fibrosis and systemic sclerosis, and thus the diseases thatresult from fibrosis (pulmonary fibrosis-Idiopathic Pulmonary Fibrosis[IPF], hepatic fibrosis-Non-alcoholic Steatohepatitis [NASH], renalfibrosis-diabetic nephropathy, systemic sclerosis-scleroderma, etc.).

SUMMARY OF THE INVENTION

The present invention provides novel cyclopentyl acid compoundsincluding stereoisomers, tautomers, pharmaceutically acceptable salts orsolvates thereof, which are useful as antagonists against one or more ofthe lysophosphatidic acid (LPA) receptors, especially the LPA1 receptor.

The present invention also provides processes and intermediates formaking the compounds of the present invention.

The present invention also provides pharmaceutical compositionscomprising a pharmaceutically acceptable carrier and at least one of thecompounds of the present invention or stereoisomers, tautomers,pharmaceutically acceptable salts or solvates thereof.

The compounds of the invention may be used in the treatment ofconditions in which LPA plays a role.

The compounds of the present invention may be used in therapy.

The compounds of the present invention may be used for the manufactureof a medicament for the treatment of a condition in which inhibition ofthe physiological activity of LPA is useful, such as diseases in whichan LPA receptor participates, is involved in the etiology or pathologyof the disease, or is otherwise associated with at least one symptom ofthe disease.

In another aspect, the present invention is directed to a method oftreating fibrosis of organs (liver, kidney, lung, heart and the like aswell as skin), liver diseases (acute hepatitis, chronic hepatitis, liverfibrosis, liver cirrhosis, portal hypertension, regenerative failure,non-alcoholic steatohepatitis (NASH), liver hypofunction, hepatic bloodflow disorder, and the like), cell proliferative disease [cancer (solidtumor, solid tumor metastasis, vascular fibroma, myeloma, multiplemyeloma, Kaposi's sarcoma, leukemia, chronic lymphocytic leukemia (CLL)and the like) and invasive metastasis of cancer cell, and the like],inflammatory disease (psoriasis, nephropathy, pneumonia and the like),gastrointestinal tract disease (irritable bowel syndrome (IBS),inflammatory bowel disease (IBD), abnormal pancreatic secretion, and thelike), renal disease, urinary tract-associated disease (benign prostatichyperplasia or symptoms associated with neuropathic bladder disease,spinal cord tumor, hernia of intervertebral disk, spinal canal stenosis,symptoms derived from diabetes, lower urinary tract disease (obstructionof lower urinary tract, and the like), inflammatory disease of lowerurinary tract, dysuria, frequent urination, and the like), pancreasdisease, abnormal angiogenesis-associated disease (arterial obstructionand the like), scleroderma, brain-associated disease (cerebralinfarction, cerebral hemorrhage, and the like), neuropathic pain,peripheral neuropathy, and the like, ocular disease (age-related maculardegeneration (AMD), diabetic retinopathy, proliferativevitreoretinopathy (PVR), cicatricial pemphigoid, glaucoma filtrationsurgery scarring, and the like).

In another aspect, the present invention is directed to a method oftreating diseases, disorders, or conditions in which activation of atleast one LPA receptor by LPA contributes to the symptomology orprogression of the disease, disorder or condition. These diseases,disorders, or conditions may arise from one or more of a genetic,iatrogenic, immunological, infectious, metabolic, oncological, toxic,surgical, and/or traumatic etiology.

In another aspect, the present invention is directed to a method oftreating renal fibrosis, pulmonary fibrosis, hepatic fibrosis, arterialfibrosis and systemic sclerosis comprising administering to a patient inneed of such treatment a compound of the present invention as describedabove.

In one aspect, the present invention provides methods, compounds,pharmaceutical compositions, and medicaments described herein thatcomprise antagonists of LPA receptors, especially antagonists of LPA1.

The compounds of the invention can be used alone, in combination withother compounds of the present invention, or in combination with one ormore, preferably one to two other agent(s).

These and other features of the invention will be set forth in expandedform as the disclosure continues.

DETAILED DESCRIPTION OF THE INVENTION I. Compounds of the Invention

In a 1st aspect, the present invention provides, inter alia, a compoundof Formula (I):

or a stereoisomer, tautomer, or pharmaceutically acceptable salt orsolvate thereof, wherein:

X¹, X², X³, and X⁴ are each independently CR⁶ or N; provided that nomore than two of X¹, X², X³, or X⁴ are N;

Q¹, Q², and Q³ are independently N, O, NR^(5a), or CR^(5b), and thedashed circle denotes bonds forming an aromatic ring; provided that atleast one of Q¹, Q², and Q³ is not CR^(5b);

L is independently a covalent bond or C₁₋₄ alkylene substituted with 0to 4 R⁹;

W is independently O, —OCH₂— or —CH₂O—;

Y¹ is independently O or NR⁷;

Y² is independently

Y³ is independently OR⁴, NR⁸R⁴ or

with the proviso that when Y¹ is O, then Y³ is not OR⁴;

Y⁵ independently is O or NH;

alternatively, —Y²—Y³ is R^(4b);

R¹ is independently cyano, —C(O)OR¹¹, —C(O)NR^(12a)R^(12b),

R² is each independently halo, cyano, hydroxyl, amino, C₁₋₄ alkoxy, C₁₋₄haloalkyl, C₁₋₄ haloalkoxy, C₁₋₄ alkylamino, —(CH₂)₀₋₁—(C₃₋₆cycloalkyl), —(CH₂)₀₋₁-phenyl, or C₁₋₆ alkyl substituted with 0 to 3R^(c);

R^(3a) is independently hydrogen, halo, hydroxyl, or C₁₋₄ alkyl;

R^(3b) is independently hydrogen, halo, cyano, hydroxyl, amino, C₁₋₄alkyl, C₁₋₄ haloalkyl, C₁₋₄ alkoxy, C₁₋₄ haloalkoxy or C₁₋₆ alkylsubstituted with 0 to 2 R^(a);

or alternatively, R^(3a) and R^(3b) together, with the carbon atom theyare attached to, form a C₃₋₄ carbocyclyl;

R⁴ is -L₁-R^(4a);

L₁ is independently a covalent bond or C₁₋₄ alkylene substituted with 0to 4 R⁹;

R^(4a) is independently C₁₋₁₀ alkyl, C₁₋₁₀ haloalkyl, C₁₋₁₀ alkenyl,C₃₋₈ cycloalkyl, C₆₋₁₀ aryl, 3 to 8-membered heterocyclyl, 5 to6-membered heteroaryl; wherein each of the alkyl, alkenyl, alkylene,cycloalkyl, aryl, heterocyclyl, and heteroaryl, by itself or as part ofother moiety, is independently substituted with 0 to 3 R¹⁰;

R^(4b) is independently C₁₋₁₀ alkyl, C₁₋₁₀ haloalkyl, C₁₋₁₀ alkenyl,C₃₋₈ cycloalkyl, C₆₋₁₀ aryl, 3 to 8-membered heterocyclyl, 5 to6-membered heteroaryl; wherein each of the alkyl, alkenyl, alkylene,cycloalkyl, aryl, heterocyclyl, and heteroaryl, by itself or as part ofother moiety, is independently substituted with 0 to 3 R^(10a);

R^(5a) is independently hydrogen, C₁₋₄ haloalkyl, —(CH₂)₀₋₁—(C₃₋₆cycloalkyl), —(CH₂)₀₋₁-phenyl, or C₁₋₆ alkyl substituted with 0 to 3R^(a);

R^(5b) is independently hydrogen, halo, cyano, hydroxyl, amino, C₁₋₄alkoxy, C₁₋₄ haloalkyl, C₁₋₄ haloalkoxy, C₁₋₄ alkylamino,—(CH₂)₀₋₁—(C₃₋₆ cycloalkyl), —(CH₂)₀₋₁-phenyl, or C₁₋₆ alkyl substitutedwith 0 to 3 R^(b);

R⁶ is each independently hydrogen, halo, cyano, hydroxyl, amino, C₁₋₄alkylamino, C₁₋₄ haloalkyl, C₁₋₄ alkoxy, C₁₋₄ haloalkoxy or C₁₋₆ alkylsubstituted with 0 to 1 R^(b);

R⁷ and R⁸ are each independently hydrogen, C₁₋₆ alkyl, C₁₋₄haloalkyl,C₃₋₆ cycloalkyl or C₁₋₆ alkyl substituted with 0 to 1 R^(c);

R⁹ is each independently halo, oxo, cyano, hydroxyl, amino, C₁₋₄haloalkyl, C₁₋₄ alkoxy, C₁₋₄ haloalkoxy, C₃₋₆ cycloalkyl, or C₁₋₆ alkylsubstituted with 0 to 3 R^(a);

R¹⁰ and R^(10a) are each independently halo, hydroxyl, amino, cyano,C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₄ alkylamino, C₁₋₄ haloalkyl, C₁₋₄alkoxy, C₁₋₄ haloalkoxy, phenyl, or 5 to 6 membered heteroaryl, C₁₋₆alkyl substituted with 0 to 3 R^(b);

R¹¹, R^(12a) and R^(12b) are each independently hydrogen, C₁₋₆ alkyl,C₃₋₆ cycloalkyl or benzyl;

R^(a) is independently halo, cyano, hydroxyl, C₁₋₄ alkoxy,C₁₋₄haloalkyl, or C₁₋₄ haloalkoxy;

R^(b) is independently halo, cyano, hydroxyl, amino, C₁₋₄ alkoxy, C₁₋₄haloalkyl, or C₁₋₄ haloalkoxy;

R^(e) is independently C₁₋₄ haloalkyl, C₃₋₆ cycloalkyl, or C₁₋₆ alkylsubstituted with 0 to 3 R^(a);

m is an integer of 0, 1, or 2; and

q is an integer of 0, 1, or 2.

In one embodiment of Formula (I), within the scope of the 1st aspect,wherein X¹, X², X³, and X⁴ are CR⁶; where R⁶ is hydrogen halo or C₁₋₄alkyl, e.g., methyl.

In another aspect, within the scope of any of the 1st aspect, whereinX¹, X², X³, and X⁴ are independently CH or CR^(6a); or one of X¹, X²,X³, and X⁴ is N, and the remaining ones are CH or CR^(6a); or two of X¹,X², X³, and X⁴ are N, and the remaining ones are CH or CR^(6a); andR^(6a) is independently halo, hydroxyl, C₁₋₆ alkyl, C₁₋₄ haloalkyl, orC₁₋₄ alkoxy.

In a 2nd aspect, within the scope of the 1st aspect, wherein:

the

moiety is independently

* denotes the attachment point to L; and

R^(5a) and R^(5b) are the same as defined in Claim 1.

In a 3rd aspect, within the scope of the 1st or 2nd aspect, wherein:

the

moiety is independently —OR^(4b), —N⁷R^(4b),

In a 4th aspect, within the scope of any of the 1st to 3rd aspects,wherein L is a covalent bond or C1-2 alkylene.

In one embodiment of Formula (Ia) or (Ib), within the scope of any ofthe 1st to 3rd aspects, wherein L is a covalent bond or —CH₂—.

In a 5th aspect, within the scope of any of the 1st to 4th aspects,wherein R^(3a) and R^(3b) are independently hydrogen or C₁₋₄ alkyl;

or alternatively, R^(3a) and R^(3b) together, with the carbon atom theyare attached to, form C₃₋₄ cycloalkyl.

In a 6th aspect, within the scope of any of the 1st to 5th aspects,wherein R¹ is CO₂H.

In a 7th aspect, within the scope of any of the 1st to 6th aspects,wherein:

X¹, X², X³, and X⁴ are independently CR⁶; or X¹, X² and X³ are CR⁶ andX⁴ is N; or X² and X³ are CR⁶ and X¹ and X⁴ are N; or X¹ and X² are CR⁶and X³ and X⁴ are N; and R⁶ is independently hydrogen, halo, hydroxyl,C₁₋₆ alkyl, C₁₋₄ haloalkyl, or C₁₋₄ alkoxy.

In an 8th aspect, within the scope of any of the 1st to 7th aspects,wherein:

X¹, X², X³, and X⁴ are independently CR⁶; or X¹, X² and X³ are CR⁶ andX⁴ is N; or X² and X³ are CR⁶ and X¹ and X⁴ are N;

the

moiety is independently

* denotes the attachment point to L;

L is independently a covalent bond or —CH₂—;

W is independently O or —OCH₂—;

the

moiety is independently —NR⁷R^(4b),

R² is each independently halo, cyano, hydroxyl, C₁₋₄ alkoxy, C₁₋₄haloalkyl or C₁₋₄ haloalkoxy;

R⁴ is independently C₃₋₆ alkyl, —(CH₂)₀₋₁—C₃₋₆ cycloalkyl, —(CH(C₁₋₂alkyl))-C₃₋₆ cycloalkyl, —(CH₂)₀₋₁-phenyl or —(CH(C₁₋₂ alkyl))-phenyl,wherein each of said cycloalkyl and phenyl is independently substitutedwith 0 to 3 R¹⁰;

R^(4b) is independently 5 to 6-membered heteroaryl substituted with 0 to2 R^(10a);

R^(5a) is independently C₁₋₆ alkyl, or —(CH₂)₀₋₁—(C₃₋₆ cycloalkyl);

R^(5b) is independently hydrogen, halo, cyano, hydroxyl, C₁₋₄ alkyl,C₁₋₄ alkoxy, C₁₋₄ haloalkyl, C₁₋₄ haloalkoxy, or —(CH₂)₀₋₁—(C₃₋₆cycloalkyl);

R⁶ is each independently hydrogen, halo, hydroxyl, C₁₋₆ alkyl, C₁₋₄haloalkyl, or C₁₋₄ alkoxy;

R⁷ and R⁸ are each independently hydrogen or C₁₋₂ alkyl;

R¹⁰ is each independently halo, cyano, hydroxyl, C₁₋₆ alkyl, C₁₋₆haloalkyl, C₁₋₆ alkoxy, or C₁₋₆ haloalkoxy;

R^(10a) is each independently halo, cyano, hydroxyl, C₁₋₆ alkyl, C₁₋₆haloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, —(CH₂)₀₋₃—C₃₋₆ cycloalkyl,phenyl or 5 to 6 membered heteroaryl;

m is 0 or 1; and

q is 0 or 1.

In a 9th aspect, within the scope of any one of the 1st to 8th aspects,wherein:

the

moiety is independently

* denotes the attachment point to L;

L is independently a covalent bond or —CH₂—;

W is independently O or —OCH₂—;

the

moiety is independently —NR⁷R^(4b),

R^(3a) and R^(3b) are each independently hydrogen or C₁₋₄ alkyl;

or alternatively, R^(3a) and R^(3b) together, with the carbon atom theyare attached to, form C₃₋₄ cycloalkyl;

R⁴ is independently C₃₋₆ alkyl, —(CH₂)₀₋₁—C₃₋₆ cycloalkyl,—(CH₂)-phenyl, or —(CH(CH₃))-phenyl; wherein wherein each of said alkyl,cycloalkyl and phenyl is independently substituted with 0 to 2 R¹⁰;

R^(4b) is independently

R⁶ is independently hydrogen, halo or C₁₋₄ alkyl;

R⁷ and R⁸ are each independently hydrogen or C₁₋₂ alkyl;

R¹⁰ is each independently halo or C₁₋₄ alkyl; and

R^(10a) is independently C₁₋₄ alkyl, —(CH₂)₁₋₃—C₃₋₆ cycloalkyl, phenylor pyridyl.

In another aspect, within the scope of any one of the 1st to 8thaspects, wherein the compound is of Formula (Ia):

or a stereoisomer, tautomer, or pharmaceutically acceptable salt orsolvate thereof.

In a 10th aspect, the present invention provides a compound of Formula(II):

or a stereoisomer, tautomer, or pharmaceutically acceptable salt orsolvate thereof,

wherein:

X⁴ is CH or N;

the

moiety is independently

* denotes the attachment point to L;

L is independently a covalent bond or —CH₂—;

W is independently O or —OCH₂—;

the

moiety is independently —NR⁷R^(4b),

R^(3a) and R^(3b) are each independently hydrogen or methyl;

or alternatively, R^(3a) and R^(3b) together, with the carbon atom theyare attached to, form cyclopropyl;

R⁴ is independently C₃₋₆ alkyl, —(CH₂)₀₋₁—C₃₋₆ cycloalkyl,—(CH₂)-phenyl, or —(CH(CH₃))-phenyl;

R^(4b) is independently

R⁶ is independently hydrogen, halo or C₁₋₄ alkyl;

R⁷ and R⁸ are each independently hydrogen or methyl;

R^(10a) is independently C₁₋₄ alkyl, phenyl or pyridyl; and

m is 0 or 1.

In another aspect, within the scope of the 10th aspect, wherein thecompound is of Formula (IIa):

or a stereoisomer, tautomer, or pharmaceutically acceptable salt orsolvate thereof.

In one embodiment of the present invention, the compound is selectedfrom any one of the Examples as described in the specification, or astereoisomer, a tautomer, or a pharmaceutically acceptable salt orsolvate thereof.

In one embodiment, the compounds of the present invention have hLPA1EC₅₀ values ≤5000 nM, using the LPA1 functional antagonist assay; inanother embodiment, the compounds of the present invention have hLPA1EC₅₀ values ≤1000 nM; in another embodiment, the compounds of thepresent invention have hLPA1 EC₅₀ values ≤500 nM; in another embodiment,the compounds of the present invention have hLPA1 EC₅₀ values ≤200 nM;in another embodiment, the compounds of the present invention have hLPA1EC₅₀ values ≤100 nM; in another embodiment, the compounds of the presentinvention have hLPA1 EC₅₀ values ≤50 nM.

II. Other Embodiments of the Invention

In some embodiments, the compound of the present invention, or apharmaceutically acceptable salt thereof, is an antagonist of at leastone LPA receptor. In some embodiments, the compound of the presentinvention, or a pharmaceutically acceptable salt thereof, is anantagonist of LPA₁. In some embodiments, the compound of the presentinvention, or a pharmaceutically acceptable salt thereof, is anantagonist of LPA₂. In some embodiments, the compound of the presentinvention, or a pharmaceutically acceptable salt thereof, is anantagonist of LPA₃.

In some embodiments, presented herein are compounds selected from activemetabolites, tautomers, pharmaceutically acceptable salts or solvates ofa compound of the present invention.

In another embodiment, the present invention provides a compositioncomprising at least one of the compounds of the present invention or astereoisomer, a tautomer, a pharmaceutically acceptable salt, or asolvate thereof.

In another embodiment, the present invention provides a pharmaceuticalcomposition, comprising a pharmaceutically acceptable carrier and atherapeutically effective amount of at least one of the compounds of thepresent invention or a stereoisomer, a tautomer, a pharmaceuticallyacceptable salt, or a solvate thereof.

In another embodiment, the present invention provides a process formaking a compound of the present invention.

In another embodiment, the present invention provides an intermediatefor making a compound of the present invention.

In another embodiment, the present invention provides a pharmaceuticalcomposition further comprising additional therapeutic agent(s).

In another embodiment, the present invention provides a method for thetreatment of a condition associated with LPA receptor mediated fibrosis,comprising administering to a patient in need of such treatment atherapeutically effective amount of at least one of the compounds of thepresent invention or a stereoisomer, a tautomer, a pharmaceuticallyacceptable salt, or a solvate thereof. As used herein, the term“patient” encompasses all mammalian species.

In another embodiment, the present invention provides a method oftreating a disease, disorder, or condition associated with dysregulationof lysophosphatidic acid receptor 1 (LPA1) in a patient in need thereof,comprising administering a therapeutically effective amount of acompound of the present invention, or a stereoisomer, a tautomer, or apharmaceutically acceptable salt or solvate thereof, to the patient. Inone embodiment of the method, the disease, disorder, or condition isrelated to pathological fibrosis, transplant rejection, cancer,osteoporosis, or inflammatory disorders. In one embodiment of themethod, the pathological fibrosis is pulmonary, liver, renal, cardiac,dernal, ocular, or pancreatic fibrosis. In one embodiment of the method,the disease, disorder, or condition is idiopathic pulmonary fibrosis(IPF), non-alcoholic steatohepatitis (NASH), non-alcoholic fatty liverdisease (NAFLD), chronic kidney disease, diabetic kidney disease, andsystemic sclerosis. In one embodiment of the method, the cancer is ofthe bladder, blood, bone, brain, breast, central nervous system, cervix,colon, endometrium, esophagus, gall bladder, genitalia, genitourinarytract, head, kidney, larynx, liver, lung, muscle tissue, neck, oral ornasal mucosa, ovary, pancreas, prostate, skin, spleen, small intestine,large intestine, stomach, testicle, or thyroid.

In another embodiment, the present invention provides a method oftreating fibrosis in a mammal comprising administering a therapeuticallyeffective amount of a compound of the present invention, or astereoisomer, a tautomer, or a pharmaceutically acceptable salt orsolvate thereof, to the mammal in need thereof. In one embodiment of themethod, the fibrosis is idiopathic pulmonary fibrosis (IPF),nonalcoholic steatohepatitis (NASH), chronic kidney disease, diabetickidney disease, and systemic sclerosis.

In another embodiment, the present invention provides a method oftreating lung fibrosis (idiopathic pulmonary fibrosis), asthma, chronicobstructive pulmonary disease (COPD), renal fibrosis, acute kidneyinjury, chronic kidney disease, liver fibrosis (non-alcoholicsteatohepatitis), skin fibrosis, fibrosis of the gut, breast cancer,pancreatic cancer, ovarian cancer, prostate cancer, glioblastoma, bonecancer, colon cancer, bowel cancer, head and neck cancer, melanoma,multiple myeloma, chronic lymphocytic leukemia, cancer pain, tumormetastasis, transplant organ rejection, scleroderma, ocular fibrosis,age related macular degeneration (AMD), diabetic retinopathy, collagenvascular disease, atherosclerosis, Raynaud's phenomenon, or neuropathicpain in a mammal comprising administering a therapeutically effectiveamount of a compound of the present invention, or a stereoisomer, atautomer, or a pharmaceutically acceptable salt or solvate thereof, tothe mammal in need thereof.

As used herein, “treating” or “treatment” cover the treatment of adisease-state in a mammal, particularly in a human, and include: (a)inhibiting the disease-state, i.e., arresting it development; and/or (b)relieving the disease-state, i.e., causing regression of the diseasestate. As used herein, “treating” or “treatment” also include theprotective treatment of a disease state to reduce and/or minimize therisk and/or reduction in the risk of recurrence of a disease state byadministering to a patient a therapeutically effective amount of atleast one of the compounds of the present invention or a or astereoisomer, a tautomer, a pharmaceutically acceptable salt, or asolvate thereof. Patients may be selected for such protective therapybased on factors that are known to increase risk of suffering a clinicaldisease state compared to the general population. For protectivetreatment, conditions of the clinical disease state may or may not bepresented yet. The protective treatment can be divided into (a) primaryprophylaxis and (b) secondary prophylaxis. Primary prophylaxis isdefined as treatment to reduce or minimize the risk of a disease statein a patient that has not yet presented with a clinical disease state,whereas secondary prophylaxis is defined as minimizing or reducing therisk of a recurrence or second occurrence of the same or similarclinical disease state.

The present invention may be embodied in other specific forms withoutdeparting from the spirit or essential attributes thereof. Thisinvention encompasses all combinations of preferred aspects of theinvention noted herein. It is understood that any and all embodiments ofthe present invention may be taken in conjunction with any otherembodiment or embodiments to describe additional embodiments. It is alsoto be understood that each individual element of the embodiments is itsown independent embodiment. Furthermore, any element of an embodiment ismeant to be combined with any and all other elements from any embodimentto describe an additional embodiment.

III. Chemistry

Throughout the specification and the appended claims, a given chemicalformula or name shall encompass all stereo and optical isomers andracemates thereof where such isomers exist. Unless otherwise indicated,all chiral (enantiomeric and diastereomeric) and racemic forms arewithin the scope of the invention. Many geometric isomers of C═C doublebonds, C═N double bonds, ring systems, and the like can also be presentin the compounds, and all such stable isomers are contemplated in thepresent invention. Cis- and trans- (or E- and Z-) geometric isomers ofthe compounds of the present invention are described and may be isolatedas a mixture of isomers or as separated isomeric forms. The presentcompounds can be isolated in optically active or racemic forms.Optically active forms may be prepared by resolution of racemic forms orby synthesis from optically active starting materials. All processesused to prepare compounds of the present invention and intermediatesmade therein are considered to be part of the present invention. Whenenantiomeric or diastereomeric products are prepared, they may beseparated by conventional methods, for example, by chromatography orfractional crystallization. Depending on the process conditions the endproducts of the present invention are obtained either in free (neutral)or salt form. Both the free form and the salts of these end products arewithin the scope of the invention. If so desired, one form of a compoundmay be converted into another form. A free base or acid may be convertedinto a salt; a salt may be converted into the free compound or anothersalt; a mixture of isomeric compounds of the present invention may beseparated into the individual isomers. Compounds of the presentinvention, free form and salts thereof, may exist in multiple tautomericforms, in which hydrogen atoms are transposed to other parts of themolecules and the chemical bonds between the atoms of the molecules areconsequently rearranged. It should be understood that all tautomericforms, insofar as they may exist, are included within the invention.

The term “stereoisomer” refers to isomers of identical constitution thatdiffer in the arrangement of their atoms in space. Enantiomers anddiastereomers are examples of stereoisomers. The term “enantiomer”refers to one of a pair of molecular species that are mirror images ofeach other and are not superimposable. The term “diastereomer” refers tostereoisomers that are not mirror images. The term “racemate” or“racemic mixture” refers to a composition composed of equimolarquantities of two enantiomeric species, wherein the composition isdevoid of optical activity.

The symbols “R” and “S” represent the configuration of substituentsaround a chiral carbon atom(s). The isomeric descriptors “R” and “S” areused as described herein for indicating atom configuration(s) relativeto a core molecule and are intended to be used as defined in theliterature (IUPAC Recommendations 1996, Pure and Applied Chemistry,68:2193-2222 (1996)).

The term “chiral” refers to the structural characteristic of a moleculethat makes it impossible to superimpose it on its mirror image. The term“homochiral” refers to a state of enantiomeric purity. The term “opticalactivity” refers to the degree to which a homochiral molecule ornonracemic mixture of chiral molecules rotates a plane of polarizedlight.

As used herein, the term “alkyl” or “alkylene” is intended to includeboth branched and straight-chain saturated aliphatic hydrocarbon groupshaving the specified number of carbon atoms. While “alkyl” denotes amonovalent saturated aliphatic radical (such as ethyl), “alkylene”denotes a bivalent saturated aliphatic radical (such as ethylene). Forexample, “C₁ to C₁₀ alkyl” or “C₁₋₁₀ alkyl” is intended to include C₁,C₂, C₃, C₄, C₅, C₆, C₇, C₈, C₉, and C₁₀ alkyl groups. “C₁ to C₁₀alkylene” or “C₁₋₁₀ alkylene”, is intended to include C₁, C₂, C₃, C₄,C₅, C₆, C₇, C₈, C₉, and C₁₀ alkylene groups. Additionally, for example,“C₁ to C₆ alkyl” or “C₁₋₆ alkyl” denotes alkyl having 1 to 6 carbonatoms; and “C₁ to C₆ alkylene” or “C₁₋₆ alkylene” denotes alkylenehaving 1 to 6 carbon atoms; and “C₁ to C₄ alkyl” or “C₁₋₄ alkyl” denotesalkyl having 1 to 4 carbon atoms; and “C₁ to C₄ alkylene” or “C₁₋₄alkylene” denotes alkylene having 1 to 4 carbon atoms. Alkyl group canbe unsubstituted or substituted with at least one hydrogen beingreplaced by another chemical group. Example alkyl groups include, butare not limited to, methyl (Me), ethyl (Et), propyl (e.g., n-propyl andisopropyl), butyl (e.g., n-butyl, isobutyl, t-butyl), and pentyl (e.g.,n-pentyl, isopentyl, neopentyl). When “C₀ alkyl” or “C₀ alkylene” isused, it is intended to denote a direct bond. Furthermore, the term“alkyl”, by itself or as part of another group, such as alkylamino,haloalkyl, hydroxyalkyl, aminoalkyl, alkoxy, alkoxyalkyl,haloalkoxyalkyl, and haloalkoxy, can be an alkyl having 1 to 4 carbonatoms, or 1 to 6 carbon atoms, or 1 to 10 carbon atoms.

“Heteroalkyl” refers to an alkyl group where one or more carbon atomshave been replaced with a heteroatom, such as, O, N, or S. For example,if the carbon atom of the alkyl group which is attached to the parentmolecule is replaced with a heteroatom (e.g., O, N, or S) the resultingheteroalkyl groups are, respectively, an alkoxy group (e.g., —OCH₃,etc.), an alkylamino (e.g., —NHCH₃, —N(CH₃)₂, etc.), or a thioalkylgroup (e.g., —SCH₃). If a non-terminal carbon atom of the alkyl groupwhich is not attached to the parent molecule is replaced with aheteroatom (e.g., O, N, or S) and the resulting heteroalkyl groups are,respectively, an alkyl ether (e.g., —CH₂CH₂—O—CH₃, etc.), analkylaminoalkyl (e.g., —CH₂NHCH₃, —CH₂N(CH₃)₂, etc.), or a thioalkylether (e.g., —CH₂—S—CH₃). If a terminal carbon atom of the alkyl groupis replaced with a heteroatom (e.g., O, N, or S), the resultingheteroalkyl groups are, respectively, a hydroxyalkyl group (e.g.,—CH₂CH₂—OH), an aminoalkyl group (e.g., —CH₂NH₂), or an alkyl thiolgroup (e.g., —CH₂CH₂—SH). A heteroalkyl group can have, for example, 1to 20 carbon atoms, 1 to 10 carbon atoms, or 1 to 6 carbon atoms. AC₁-C₆ heteroalkyl group means a heteroalkyl group having 1 to 6 carbonatoms.

“Alkenyl” or “alkenylene” is intended to include hydrocarbon chains ofeither straight or branched configuration having the specified number ofcarbon atoms and one or more, preferably one to two, carbon-carbondouble bonds that may occur in any stable point along the chain. Forexample, “C₂ to C₆ alkenyl” or “C₂₋₆ alkenyl” (or alkenylene), isintended to include C₂, C₃, C₄, C₅, and C₆ alkenyl groups. Examples ofalkenyl include, but are not limited to, ethenyl, 1-propenyl,2-propenyl, 2-butenyl, 3-butenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl,2-hexenyl, 3-hexenyl, 4-hexenyl, 5-hexenyl, 2-methyl-2-propenyl, and4-methyl-3-pentenyl.

“Alkynyl” or “alkynylene” is intended to include hydrocarbon chains ofeither straight or branched configuration having one or more, preferablyone to three, carbon-carbon triple bonds that may occur in any stablepoint along the chain. For example, “C₂ to C₆ alkynyl” or “C₂₋₆ alkynyl”(or alkynylene), is intended to include C₂, C₃, C₄, C₅, and C₆ alkynylgroups; such as ethynyl, propynyl, butynyl, pentynyl, and hexynyl.

As used herein, “arylalkyl” (a.k.a. aralkyl), “heteroarylalkyl”“carbocyclylalkyl” or “heterocyclylalkyl” refers to an acyclic alkylradical in which one of the hydrogen atoms bonded to a carbon atom,typically a terminal or sp³ carbon atom, is replaced with an aryl,heteroaryl, carbocyclyl, or heterocyclyl radical, respectively. Typicalarylalkyl groups include, but are not limited to, benzyl,2-phenylethan-1-yl, naphthylmethyl, 2-naphthylethan-1-yl, naphthobenzyl,2-naphthophenylethan-1-yl and the like. The arylalkyl, heteroarylalkyl,carbocyclylalkyl, or heterocyclylalkyl group can comprise 4 to 20 carbonatoms and 0 to 5 heteroatoms, e.g., the alkyl moiety may contain 1 to 6carbon atoms.

The term “benzyl”, as used herein, refers to a methyl group on which oneof the hydrogen atoms is replaced by a phenyl group, wherein said phenylgroup may optionally be substituted with 1 to 5 groups, preferably 1 to3 groups, OH, OCH₃, Cl, F, Br, I, CN, NO₂, NH₂, N(CH₂)H, N(CH₃)₂, CF₃,OCF₃, C(═O)CH₃, SCH₃, S(═O)CH₃, S(═O)₂CH₃, CH₃, CH₂CH₃, CO₂H, andCO₂CH₃. “Benzyl” can also be represented by formula “Bn”.

The term “alkoxy” or “alkyloxy” refers to an —O-alkyl group. “C₁ to C₆alkoxy” or “C₁₋₆ alkoxy” (or alkyloxy), is intended to include C₁, C₂,C₃, C₄, C₅, and C₆ alkoxy groups. Example alkoxy groups include, but arenot limited to, methoxy, ethoxy, propoxy (e.g., n-propoxy andisopropoxy), and t-butoxy. Similarly, “alkylthio” or “thioalkoxy”represents an alkyl group as defined above with the indicated number ofcarbon atoms attached through a sulphur bridge; for example, methyl-S—and ethyl-S—.

The term “alkanoyl” or “alkylcarbonyl” as used herein alone or as partof another group refers to alkyl linked to a carbonyl group. Forexample, alkylcarbonyl may be represented by alkyl-C(O)—. “C₁ to C₆alkylcarbonyl” (or alkylcarbonyl), is intended to include C₁, C₂, C₃,C₄, C₅, and C₆ alkyl-C(O)— groups.

The term “alkylsulfonyl” or “sulfonamide” as used herein alone or aspart of another group refers to alkyl or amino linked to a sulfonylgroup. For example, alkylsulfonyl may be represented by —S(O)₂R′, whilesulfonamide may be represented by —S(O)₂NR^(c)R^(d). R′ is C₁ to C₆alkyl; and R^(c) and R^(d) are the same as defined below for “amino”.

The term “carbamate” as used herein alone or as part of another grouprefers to oxygen linked to an amido group. For example, carbamate may berepresented by N(R^(c)R^(d))—C(O)—O—, and R^(c) and R^(d) are the sameas defined below for “amino”.

The term “amido” as used herein alone or as part of another group refersto amino linked to a carbonyl group. For example, amido may berepresented by N(R^(c)R^(d))—C(O)—, and R^(c) and R^(d) are the same asdefined below for “amino”.

The term “amino” is defined as —NR^(c1)R^(c2), wherein R^(c1) and R^(c2)are independently H or

C₁₋₆ alkyl; or alternatively, R^(c1) and R^(c2), taken together with theatoms to which they are attached, form a 3- to 8-membered heterocyclicring which is optionally substituted with one or more group selectedfrom halo, cyano, hydroxyl, amino, oxo, C₁₋₆ alkyl, alkoxy, andaminoalkyl. When R^(c1) or R^(c2) (or both of them) is C₁₋₆ alkyl, theamino group can also be referred to as alkylamino. Examples ofalkylamino group include, without limitation, methylamino, ethylamino,propylamino, isopropylamino and the like. In one embodiment, amino is—NH₂.

The term “aminoalkyl” refers to an alkyl group on which one of thehydrogen atoms is replaced by an amino group. For example, aminoalkylmay be represented by N(R^(c1)R^(c2))-alkylene-. “C₁ to C₆” or “C₁₋₆aminoalkyl” (or aminoalkyl), is intended to include C₁, C₂, C₃, C₄, C₅,and C₆ aminoalkyl groups.

The term “halogen” or “halo” as used herein alone or as part of anothergroup refers to chlorine, bromine, fluorine, and iodine, with chlorineor fluorine being preferred.

“Haloalkyl” is intended to include both branched and straight-chainsaturated aliphatic hydrocarbon groups having the specified number ofcarbon atoms, substituted with one or more halogens. “C₁ to C₆haloalkyl” or “C₁₋₆ haloalkyl” (or haloalkyl), is intended to includeC₁, C₂, C₃, C₄, C₅, and C₆ haloalkyl groups. Examples of haloalkylinclude, but are not limited to, fluoromethyl, difluoromethyl,trifluoromethyl, trichloromethyl, pentafluoroethyl, pentachloroethyl,2,2,2-trifluoroethyl, heptafluoropropyl, and heptachloropropyl. Examplesof haloalkyl also include “fluoroalkyl” that is intended to include bothbranched and straight-chain saturated aliphatic hydrocarbon groupshaving the specified number of carbon atoms, substituted with 1 or morefluorine atoms. The term “polyhaloalkyl” as used herein refers to an“alkyl” group as defined above which includes from 2 to 9, preferablyfrom 2 to 5, halo substituents, such as F or Cl, preferably F, such aspolyfluoroalkyl, for example, CF₃CH₂, CF₃ or CF₃CF₂CH₂.

“Haloalkoxy” or “haloalkyloxy” represents a haloalkyl group as definedabove with the indicated number of carbon atoms attached through anoxygen bridge. For example, “C₁ to C₆ haloalkoxy” or “C₁₋₆ haloalkoxy”,is intended to include C₁, C₂, C₃, C₄, C₅, and C₆ haloalkoxy groups.Examples of haloalkoxy include, but are not limited to,trifluoromethoxy, 2,2,2-trifluoroethoxy, and pentafluorothoxy.Similarly, “haloalkylthio” or “thiohaloalkoxy” represents a haloalkylgroup as defined above with the indicated number of carbon atomsattached through a sulphur bridge; for example trifluoromethyl-S—, andpentafluoroethyl-S—. The term “polyhaloalkyloxy” as used herein refersto an “alkoxy” or “alkyloxy” group as defined above which includes from2 to 9, preferably from 2 to 5, halo substituents, such as F or Cl,preferably F, such as polyfluoroalkoxy, for example, CF₃CH₂O, CF₃O orCF₃CF₂CH₂O.

“Hydroxyalkyl” is intended to include both branched and straight-chainsaturated aliphatic hydrocarbon groups having the specified number ofcarbon atoms, substituted with 1 or more hydroxyl (OH). “C₁ to C₆hydroxyalkyl” (or hydroxyalkyl), is intended to include C₁, C₂, C₃, C₄,C₅, and C₆ hydroxyalkyl groups.

The term “cycloalkyl” refers to cyclized alkyl groups, including mono-,bi- or poly-cyclic ring systems. “C₃ to C₈ cycloalkyl” or “C₃₋₈cycloalkyl” is intended to include C₃, C₄, C₅, C₆, C₇, and C₈ cycloalkylgroups, including monocyclic, bicyclic, and polycyclic rings. Examplecycloalkyl groups include, but are not limited to, cyclopropyl,cyclobutyl, cyclopentyl, cyclohexyl, and norbornyl. Branched cycloalkylgroups such as 1-methylcyclopropyl and 2-methylcyclopropyl and spiro andbridged cycloalkyl groups are included in the definition of“cycloalkyl”.

The term “cycloheteroalkyl” refers to cyclized heteroalkyl groups,including mono-, bi- or poly-cyclic ring systems. “C₃ to C₇cycloheteroalkyl” or “C₃₋₇ cycloheteroalkyl” is intended to include C₃,C₄, C₅, C₆, and C₇ cycloheteroalkyl groups. Example cycloheteroalkylgroups include, but are not limited to, oxetanyl, tetrahydrofuranyl,tetrahydropyranyl, azetidinyl, pyrrolidinyl, piperidinyl, morpholinyl,and piperazinyl. Branched cycloheteroalkyl groups, such aspiperidinylmethyl, piperazinylmethyl, morpholinylmethyl,pyridinylmethyl, pyridizylmethyl, pyrimidylmethyl, and pyrazinylmethyl,are included in the definition of “cycloheteroalkyl”.

As used herein, “carbocycle”, “carbocyclyl” or “carbocyclic residue” isintended to mean any stable 3-, 4-, 5-, 6-, 7-, or 8-membered monocyclicor bicyclic or 7-, 8-, 9-, 10-, 11-, 12-, or 13-membered bicyclic ortricyclic hydrocarbon ring, any of which may be saturated, partiallyunsaturated, unsaturated or aromatic. Examples of such carbocyclesinclude, but are not limited to, cyclopropyl, cyclobutyl, cyclobutenyl,cyclopentyl, cyclopentenyl, cyclohexyl, cycloheptenyl, cycloheptyl,cycloheptenyl, adamantyl, cyclooctyl, cyclooctenyl, cyclooctadienyl,[3.3.0]bicyclooctane, [4.3.0]bicyclononane, [4.4.0]bicyclodecane(decalin), [2.2.2]bicyclooctane, fluorenyl, phenyl, naphthyl, indanyl,adamantyl, anthracenyl, and tetrahydronaphthyl (tetralin). As shownabove, bridged rings are also included in the definition of carbocycle(e.g., [2.2.2]bicyclooctane). Preferred carbocycles, unless otherwisespecified, are cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl,and indanyl. When the term “carbocyclyl” is used, it is intended toinclude “aryl”. A bridged ring occurs when one or more carbon atoms linktwo non-adjacent carbon atoms. Preferred bridges are one or two carbonatoms. It is noted that a bridge always converts a monocyclic ring intoa tricyclic ring. When a ring is bridged, the substituents recited forthe ring may also be present on the bridge.

Furthermore, the term “carbocyclyl”, including “cycloalkyl” and“cycloalkenyl”, as employed herein alone or as part of another groupincludes saturated or partially unsaturated (containing 1 or 2 doublebonds) cyclic hydrocarbon groups containing 1 to 3 rings, includingmonocyclicalkyl, bicyclicalkyl and tricyclicalkyl, containing a total of3 to 20 carbons forming the rings, preferably 3 to 10 carbons or 3 to 6carbons, forming the ring and which may be fused to 1 or 2 aromaticrings as described for aryl, which include cyclopropyl, cyclobutyl,cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclodecyl andcyclododecyl, cyclohexenyl,

any of which groups may be optionally substituted with 1 to 4substituents such as halogen, alkyl, alkoxy, hydroxy, aryl, aryloxy,arylalkyl, cycloalkyl, alkylamido, alkanoylamino, oxo, acyl,arylcarbonylamino, nitro, cyano, thiol and/or alkylthio and/or any ofthe alkyl substituents.

As used herein, the term “bicyclic carbocyclyl” or “bicyclic carbocyclicgroup” is intended to mean a stable 9- or 10-membered carbocyclic ringsystem that contains two fused rings and consists of carbon atoms. Ofthe two fused rings, one ring is a benzo ring fused to a second ring;and the second ring is a 5- or 6-membered carbon ring which issaturated, partially unsaturated, or unsaturated. The bicycliccarbocyclic group may be attached to its pendant group at any carbonatom which results in a stable structure. The bicyclic carbocyclic groupdescribed herein may be substituted on any carbon if the resultingcompound is stable. Examples of a bicyclic carbocyclic group are, butnot limited to, naphthyl, 1,2-dihydronaphthyl,1,2,3,4-tetrahydronaphthyl, and indanyl.

As used herein, the term “aryl”, as employed herein alone or as part ofanother group, refers to monocyclic or polycyclic (including bicyclicand tricyclic) aromatic hydrocarbons, including, for example, phenyl,naphthyl, anthracenyl, and phenanthranyl. Aryl moieties are well knownand described, for example, in Lewis, R. J., ed., Hawley's CondensedChemical Dictionary, 13th Edition, John Wiley & Sons, Inc., New York(1997). In one embodiment, the term “aryl” denotes monocyclic andbicyclic aromatic groups containing 6 to 10 carbons in the ring portion(such as phenyl or naphthyl including 1-naphthyl and 2-naphthyl). Forexample, “C₆ or C₁₀ aryl” or “C₆₋₁₀ aryl” refers to phenyl and naphthyl.Unless otherwise specified, “aryl”, “C₆ or C₁₀ aryl”, “C₆₋₁₀ aryl”, or“aromatic residue” may be unsubstituted or substituted with 1 to 5groups, preferably 1 to 3 groups, selected from OH, OCH₃, Cl, F, Br, I,CN, NO₂, NH₂, N(CH₂)H, N(CH₃)₂, CF₃, OCF₃, C(═O)CH₃, SCH₃, S(═O)CH₃,S(═O)₂CH₃, CH₃, CH₂CH₃, CO₂H, and CO₂CH₃.

The term “benzyl”, as used herein, refers to a methyl group on which oneof the hydrogen atoms is replaced by a phenyl group, wherein said phenylgroup may optionally be substituted with 1 to 5 groups, preferably 1 to3 groups, OH, OCH₃, Cl, F, Br, I, CN, NO₂, NH₂, N(CH₃)H, N(CH₃)₂, CF₃,OCF₃, C(═O)CH₃, SCH₃, S(═O)CH₃, S(═O)₂CH₃, CH₃, CH₂CH₃, CO₂H, andCO₂CH₃.

As used herein, the term “heterocycle”, “heterocyclyl”, or “heterocyclicgroup” is intended to mean a stable 3-, 4-, 5-, 6-, or 7-memberedmonocyclic or 5-, 6-, 7-, 8-, 9-, 10-, 11-, 12-, 13-, or 14-memberedpolycyclic (including bicyclic and tricyclic) heterocyclic ring that issaturated, or partially unsaturated, and that contains carbon atoms and1, 2, 3 or 4 heteroatoms independently selected from N, O and S; andincluding any polycyclic group in which any of the above-definedheterocyclic rings is fused to a carbocyclic or an aryl (e.g., benzene)ring. That is, the term “heterocycle”, “heterocyclyl”, or “heterocyclicgroup” includes non-aromatic ring systems, such as heterocycloalkyl andheterocycloalkenyl. The nitrogen and sulfur heteroatoms may optionallybe oxidized (i.e., N→O and S(O)_(p), wherein p is 0, 1 or 2). Thenitrogen atom may be substituted or unsubstituted (i.e., N or NR whereinR is H or another substituent, if defined). The heterocyclic ring may beattached to its pendant group at any heteroatom or carbon atom thatresults in a stable structure. The heterocyclic rings described hereinmay be substituted on carbon or on a nitrogen atom if the resultingcompound is stable. A nitrogen in the heterocycle may optionally bequaternized. It is preferred that when the total number of S and O atomsin the heterocycle exceeds 1, then these heteroatoms are not adjacent toone another. It is preferred that the total number of S and O atoms inthe heterocycle is not more than 1. Examples of hetercyclyl include,without limitation, azetidinyl, piperazinyl, piperidinyl, piperidonyl,piperonyl, pyranyl, morpholinyl, tetrahydrofuranyl,tetrahydroisoquinolinyl, tetrahydroquinolinyl, morpholinyl,dihydrofuro[2,3-b]tetrahydrofuran.

As used herein, the term “bicyclic heterocycle” or “bicyclicheterocyclic group” is intended to mean a stable 9- or 10-memberedheterocyclic ring system which contains two fused rings and consists ofcarbon atoms and 1, 2, 3, or 4 heteroatoms independently selected fromN, O and S. Of the two fused rings, one ring is a 5- or 6-memberedmonocyclic aromatic ring comprising a 5-membered heteroaryl ring, a6-membered heteroaryl ring or a benzo ring, each fused to a second ring.The second ring is a 5- or 6-membered monocyclic ring which issaturated, partially unsaturated, or unsaturated, and comprises a5-membered heterocycle, a 6-membered heterocycle or a carbocycle(provided the first ring is not benzo when the second ring is acarbocycle).

The bicyclic heterocyclic group may be attached to its pendant group atany heteroatom or carbon atom which results in a stable structure. Thebicyclic heterocyclic group described herein may be substituted oncarbon or on a nitrogen atom if the resulting compound is stable. It ispreferred that when the total number of S and O atoms in the heterocycleexceeds 1, then these heteroatoms are not adjacent to one another. It ispreferred that the total number of S and O atoms in the heterocycle isnot more than 1. Examples of a bicyclic heterocyclic group are, but notlimited to, 1,2,3,4-tetrahydroquinolinyl,1,2,3,4-tetrahydroisoquinolinyl, 5,6,7,8-tetrahydro-quinolinyl,2,3-dihydro-benzofuranyl, chromanyl, 1,2,3,4-tetrahydro-quinoxalinyl,and 1,2,3,4-tetrahydro-quinazolinyl.

Bridged rings are also included in the definition of heterocycle. Abridged ring occurs when one or more atoms (i.e., C, O, N, or S) linktwo non-adjacent carbon or nitrogen atoms. Examples of bridged ringsinclude, but are not limited to, one carbon atom, two carbon atoms, onenitrogen atom, two nitrogen atoms, and a carbon-nitrogen group. It isnoted that a bridge always converts a monocyclic ring into a tricyclicring. When a ring is bridged, the substituents recited for the ring mayalso be present on the bridge.

As used herein, the term “heteroaryl” is intended to mean stablemonocyclic and polycyclic (including bicyclic and tricyclic) aromatichydrocarbons that include at least one heteroatom ring member such assulfur, oxygen, or nitrogen. Heteroaryl groups include, withoutlimitation, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl,furyl, quinolyl, isoquinolyl, thienyl, imidazolyl, thiazolyl, indolyl,pyrroyl, oxazolyl, benzofuryl, benzothienyl, benzthiazolyl, isoxazolyl,pyrazolyl, triazolyl, tetrazolyl, indazolyl, 1,2,4-thiadiazolyl,isothiazolyl, purinyl, carbazolyl, benzimidazolyl, indolinyl,benzodioxolanyl, and benzodioxane. Heteroaryl groups are substituted orunsubstituted. The nitrogen atom is substituted or unsubstituted (i.e.,N or NR wherein R is H or another substituent, if defined). The nitrogenand sulfur heteroatoms may optionally be oxidized (i.e., N→O andS(O)_(p), wherein p is 0, 1 or 2).

Examples of heteroaryl also include, but are not limited to, acridinyl,azocinyl, benzimidazolyl, benzofuranyl, benzothiofuranyl,benzothiophenyl, benzoxazolyl, benzoxazolinyl, benzthiazolyl,benztriazolyl, benztetrazolyl, benzisoxazolyl, benzisothiazolyl,benzimidazolinyl, carbazolyl, 4aH-carbazolyl, carbolinyl, chromanyl,chromenyl, cinnolinyl, decahydroquinolinyl, 2H,6H-1,5,2-dithiazinyl,furanyl, furazanyl, imidazolidinyl, imidazolinyl, imidazolyl,1H-indazolyl, imidazolopyridinyl, indolenyl, indolinyl, indolizinyl,indolyl, 3H-indolyl, isatinoyl, isobenzofuranyl, isochromanyl,isoindazolyl, isoindolinyl, isoindolyl, isoquinolinyl, isothiazolyl,isothiazolopyridinyl, isoxazolyl, isoxazolopyridinyl,methylenedioxyphenyl, naphthyridinyl, octahydroisoquinolinyl,oxadiazolyl, 1,2,3-oxadiazolyl, 1,2,4-oxadiazolyl, 1,2,5-oxadiazolyl,1,3,4-oxadiazolyl, oxazolidinyl, oxazolyl, oxazolopyridinyl,oxazolidinylperimidinyl, oxindolyl, pyrimidinyl, phenanthridinyl,phenanthrolinyl, phenazinyl, phenothiazinyl, phenoxathianyl,phenoxazinyl, phthalazinyl, pteridinyl, purinyl, pyrazinyl,pyrazolidinyl, pyrazolinyl, pyrazolopyridinyl, pyrazolyl, pyridazinyl,pyridooxazolyl, pyridoimidazolyl, pyridothiazolyl, pyridinyl,pyrimidinyl, pyrrolidinyl, pyrrolinyl, 2-pyrrolidonyl, 2H-pyrrolyl,pyrrolyl, quinazolinyl, quinolinyl, 4H-quinolizinyl, quinoxalinyl,quinuclidinyl, tetrazolyl, tetrahydrofuranyl, tetrahydroisoquinolinyl,tetrahydroquinolinyl, 6H-1,2,5-thiadiazinyl, 1,2,3-thiadiazolyl,1,2,4-thiadiazolyl, 1,2,5-thiadiazolyl, 1,3,4-thiadiazolyl,thianthrenyl, thiazolyl, thienyl, thiazolopyridinyl, thienothiazolyl,thienooxazolyl, thienoimidazolyl, thiophenyl, triazinyl,1,2,3-triazolyl, 1,2,4-triazolyl, 1,2,5-triazolyl, 1,3,4-triazolyl, andxanthenyl.

Examples of 5- to 10-membered heteroaryl include, but are not limitedto, pyridinyl, furanyl, thienyl, pyrazolyl, imidazolyl, imidazolidinyl,indolyl, tetrazolyl, isoxazolyl, oxazolyl, oxadiazolyl, oxazolidinyl,thiadiazinyl, thiadiazolyl, thiazolyl, triazinyl, triazolyl,benzimidazolyl, 1H-indazolyl, benzofuranyl, benzothiofuranyl,benztetrazolyl, benzotriazolyl, benzisoxazolyl, benzoxazolyl, oxindolyl,benzoxazolinyl, benzthiazolyl, benzisothiazolyl, isatinoyl,isoquinolinyl, octahydroisoquinolinyl, isoxazolopyridinyl, quinazolinyl,quinolinyl, isothiazolopyridinyl, thiazolopyridinyl, oxazolopyridinyl,imidazolopyridinyl, and pyrazolopyridinyl. Examples of 5- to 6-memberedheteroaryl include, but are not limited to, pyridinyl, furanyl, thienyl,pyrrolyl, pyrazolyl, pyrazinyl, imidazolyl, imidazolidinyl, indolyl,tetrazolyl, isoxazolyl, oxazolyl, oxadiazolyl, oxazolidinyl,thiadiazinyl, thiadiazolyl, thiazolyl, triazinyl, and triazolyl. In someembodiments, the heteroaryl are selected from benzthiazolyl,imidazolpyridinyl, pyrrolopyridinyl, quinolinyl, and indolyl.

Unless otherwise indicated, “carbocyclyl” or “heterocyclyl” includes oneto three additional rings fused to the carbocyclic ring or theheterocyclic ring (such as aryl, cycloalkyl, heteroaryl orcycloheteroalkyl rings), for example,

and may be optionally substituted through available carbon or nitrogenatoms (as applicable) with 1, 2, or 3 groups selected from hydrogen,halo, haloalkyl, alkyl, haloalkyl, alkoxy, haloalkoxy, alkenyl,trifluoromethyl, trifluoromethoxy, alkynyl, cycloalkyl-alkyl,cycloheteroalkyl, cycloheteroalkylalkyl, aryl, heteroaryl, arylalkyl,aryloxy, aryloxyalkyl, arylalkoxy, alkoxycarbonyl, arylcarbonyl,arylalkenyl, aminocarbonylaryl, arylthio, arylsulfinyl, arylazo,heteroarylalkyl, heteroarylalkenyl, heteroarylheteroaryl, heteroaryloxy,hydroxy, nitro, cyano, thiol, alkylthio, arylthio, heteroarylthio,arylthioalkyl, alkoxyarylthio, alkylcarbonyl, arylcarbonyl,alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonyl, aminocarbonyl,alkylcarbonyloxy, arylcarbonyloxy, alkylcarbonylamino,arylcarbonylamino, arylsulfinyl, arylsulfinylalkyl, arylsulfonylaminoand arylsulfonaminocarbonyl and/or any of the alkyl substituents set outherein.

When any of the terms alkyl, alkenyl, alkynyl, cycloalkyl, carbocyclyl,heterocyclyl, aryl, and heteroaryl are used as part of another group,the number of carbon atoms and ring members are the same as thosedefined in the terms by themselves. For example, alkoxy, haloalkoxy,alkylamino, haloalkyl, hydroxyalkyl, aminoalkyl, haloalkoxy,alkoxyalkoxy, haloalkylamino, alkoxyalkylamino, haloalkoxyalkylamino,alkylthio, and the like each independently contains the number of carbonatoms which are the same as defined for the term “alkyl”, such as 1 to 4carbon atoms, 1 to 6 carbon atoms, 1 to 10 carbon atoms, etc. Similarly,cycloalkoxy, heterocyclyloxy, cycloalkylamino, heterocyclylamino,aralkylamino, arylamino, aryloxy, aralkyloxy, heteroaryloxy,heteroarylalkyloxy, and the like each independently contains ringmembers which are the same as defined for the terms “cycloalkyl”,“heterocyclyl”, “aryl”, and “heteroaryl”, such as 3 to 6-membered, 4 to7-membered, 6 to 10-membered, 5 to 10-membered, 5 or 6-membered, etc.

In accordance with a convention used in the art, a bond pointing to abold line, such as

as used in structural formulas herein, depicts the bond that is thepoint of attachment of the moiety or substituent to the core or backbonestructure.

In accordance with a convention used in the art, a wavy or squiggly bondin a structural formula, such as

is used to depict a stereogenic center of the carbon atom to which X′,Y′, and Z′ are attached and is intended to represent both enantiomers ina single FIGURE. That is, a structural formula with such as wavy bonddenotes each of the enantiomers individually, such as

as well as a racemic mixture thereof. When a wavy or squiggly bond isattached to a double bond (such as C═C or C═N) moiety, it include cis-or trans- (or E- and Z-) geometric isomers or a mixture thereof.

It is understood herein that if a carbocyclic or heterocyclic moiety maybe bonded or otherwise attached to a designated substrate throughdiffering ring atoms without denoting a specific point of attachment,then all possible points are intended, whether through a carbon atom or,for example, a trivalent nitrogen atom. For example, the term “pyridyl”means 2-, 3- or 4-pyridyl, the term “thienyl” means 2- or 3-thienyl, andso forth.

When a bond to a substituent is shown to cross a bond connecting twoatoms in a ring, then such substituent may be bonded to any atom on thering. When a substituent is listed without indicating the atom in whichsuch substituent is bonded to the rest of the compound of a givenformula, then such substituent may be bonded via any atom in suchsubstituent. Combinations of substituents and/or variables arepermissible only if such combinations result in stable compounds.

One skilled in the art will recognize that substituents and othermoieties of the compounds of the present invention should be selected inorder to provide a compound which is sufficiently stable to provide apharmaceutically useful compound which can be formulated into anacceptably stable pharmaceutical composition. Compounds of the presentinvention which have such stability are contemplated as falling withinthe scope of the present invention.

The term “counter ion” is used to represent a negatively charged speciessuch as chloride, bromide, hydroxide, acetate, and sulfate. The term“metal ion” refers to alkali metal ions such as sodium, potassium orlithium and alkaline earth metal ions such as magnesium and calcium, aswell as zinc and aluminum.

As referred to herein, the term “substituted” means that at least onehydrogen atom (attached to carbon atom or heteroatom) is replaced with anon-hydrogen group, provided that normal valencies are maintained andthat the substitution results in a stable compound. When a substituentis oxo (i.e., ═O), then 2 hydrogens on the atom are replaced. Oxosubstituents are not present on aromatic moieties. When a ring system(e.g., carbocyclic or heterocyclic) is said to be substituted with acarbonyl group or a double bond, it is intended that the carbonyl groupor double bond be part (i.e., within) of the ring. Ring double bonds, asused herein, are double bonds that are formed between two adjacent ringatoms (e.g., C═C, C═N, or N═N). The term “substituted” in reference toalkyl, cycloalkyl, heteroalkyl, cycloheteroalkyl, alkylene, aryl,arylalkyl, heteroaryl, heteroarylalkyl, carbocyclyl, and heterocyclyl,means alkyl, cycloalkyl, heteroalkyl, cycloheteroalkyl, alkylene, aryl,arylalkyl, heteroaryl, heteroarylalkyl, carbocyclyl, and heterocyclyl,respectively, in which one or more hydrogen atoms, which are attached toeither carbon or heteroatom, are each independently replaced with one ormore non-hydrogen substituent(s).

In cases wherein there are nitrogen atoms (e.g., amines) on compounds ofthe present invention, these may be converted to N-oxides by treatmentwith an oxidizing agent (e.g., mCPBA and/or hydrogen peroxides) toafford other compounds of this invention. Thus, shown and claimednitrogen atoms are considered to cover both the shown nitrogen and itsN-oxide (N→O) derivative.

When any variable occurs more than one time in any constituent orformula for a compound, its definition at each occurrence is independentof its definition at every other occurrence. Thus, for example, if agroup is shown to be substituted with 0, 1, 2, or 3 R groups, then saidgroup be unsubstituted when it is substituted with 0 R group, or besubstituted with up to three R groups, and at each occurrence R isselected independently from the definition of R.

Also, combinations of substituents and/or variables are permissible onlyif such combinations result in stable compounds.

As used herein, the term “tautomer” refers to each of two or moreisomers of a compound that exist together in equilibrium, and arereadily interchanged by migration of an atom or group within themolecule For example, one skilled in the art would readily understandthat a 1,2,3-triazole exists in two tautomeric forms as defined above:

Thus, this disclosure is intended to cover all possible tautomers evenwhen a structure depicts only one of them.

The phrase “pharmaceutically acceptable” is employed herein to refer tothose compounds, materials, compositions, and/or dosage forms that are,within the scope of sound medical judgment, suitable for use in contactwith the tissues of human beings and animals without excessive toxicity,irritation, allergic response, and/or other problem or complication,commensurate with a reasonable benefit/risk ratio.

The compounds of the present invention can be present as salts, whichare also within the scope of this invention. Pharmaceutically acceptablesalts are preferred. As used herein, “pharmaceutically acceptable salts”refer to derivatives of the disclosed compounds wherein the parentcompound is modified by making acid or base salts thereof. Thepharmaceutically acceptable salts of the present invention can besynthesized from the parent compound that contains a basic or acidicmoiety by conventional chemical methods. Generally, such salts can beprepared by reacting the free acid or base forms of these compounds witha stoichiometric amount of the appropriate base or acid in water or inan organic solvent, or in a mixture of the two; generally, nonaqueousmedia like ether, ethyl acetate, ethanol, isopropanol, or acetonitrileare preferred. Lists of suitable salts are found in Remington'sPharmaceutical Sciences, 18th Edition, Mack Publishing Company, Easton,Pa. (1990), the disclosure of which is hereby incorporated by reference.

If the compounds of the present invention have, for example, at leastone basic center, they can form acid addition salts. These are formed,for example, with strong inorganic acids, such as mineral acids, forexample sulfuric acid, phosphoric acid or a hydrohalic acid, withorganic carboxylic acids, such as alkanecarboxylic acids of 1 to 4carbon atoms, for example acetic acid, which are unsubstituted orsubstituted, for example, by halogen as chloroacetic acid, such assaturated or unsaturated dicarboxylic acids, for example oxalic,malonic, succinic, maleic, fumaric, phthalic or terephthalic acid, suchas hydroxycarboxylic acids, for example ascorbic, glycolic, lactic,malic, tartaric or citric acid, such as amino acids, (for exampleaspartic or glutamic acid or lysine or arginine), or benzoic acid, orwith organic sulfonic acids, such as (C₁-C₄) alkyl or arylsulfonic acidswhich are unsubstituted or substituted, for example by halogen, forexample methyl- or p-toluene-sulfonic acid. Corresponding acid additionsalts can also be formed having, if desired, an additionally presentbasic center. The compounds of the present invention having at least oneacid group (for example COOH) can also form salts with bases. Suitablesalts with bases are, for example, metal salts, such as alkali metal oralkaline earth metal salts, for example sodium, potassium or magnesiumsalts, or salts with ammonia or an organic amine, such as morpholine,thiomorpholine, piperidine, pyrrolidine, a mono, di or tri-loweralkylamine, for example ethyl, tert-butyl, diethyl, diisopropyl,triethyl, tributyl or dimethyl-propylamine, or a mono, di or trihydroxylower alkylamine, for example mono, di or triethanolamine. Correspondinginternal salts may furthermore be formed. Salts which are unsuitable forpharmaceutical uses but which can be employed, for example, for theisolation or purification of free compounds of the present invention, ortheir pharmaceutically acceptable salts, are also included.

Preferred salts of the compounds of the present invention which containa basic group include monohydrochloride, hydrogensulfate,methanesulfonate, phosphate, nitrate or acetate.

Preferred salts of the compounds of the present invention which containan acid group include sodium, potassium and magnesium salts andpharmaceutically acceptable organic amines.

In addition, compounds of the present invention may have prodrug forms.Any compound that will be converted in vivo to provide the bioactiveagent (i.e., a compound of formula I) is a prodrug within the scope andspirit of the invention. Various forms of prodrugs are well known in theart. For examples of such prodrug derivatives, see:

a) Bundgaard, H., ed., Design of Prodrugs, Elsevier (1985), and Widder,K. et al., eds., Methods in Enzymology, 112:309-396, Academic Press(1985);

b) Bundgaard, H., Chapter 5, “Design and Application of Prodrugs”, ATextbook of Drug Design and Development, pp. 113-191, Krosgaard-Larsen,P. et al., eds., Harwood Academic Publishers (1991);

c) Bundgaard, H., Adv. Drug Deliv. Rev., 8:1-38 (1992);

d) Bundgaard, H. et al., J. Pharm. Sci., 77:285 (1988); and

e) Kakeya, N. et al., Chem. Pharm. Bull., 32:692 (1984).

The compounds of the present invention contain a carboxy group which canform physiologically hydrolyzable esters that serve as prodrugs, i.e.,“prodrug esters”, by being hydrolyzed in the body to yield the compoundsof the present invention per se. Examples of physiologicallyhydrolyzable esters of compounds of the present invention include C₁ toC₆ alkyl, C₁ to C₆ alkylbenzyl, 4-methoxybenzyl, indanyl, phthalyl,methoxymethyl, C₁₋₆ alkanoyloxy-C₁₋₆ alkyl (e.g., acetoxymethyl,pivaloyloxymethyl or propionyloxymethyl), C₁ to C₆ alkoxycarbonyloxy-C₁to C₆ alkyl (e.g., methoxycarbonyl-oxymethyl or ethoxycarbonyloxymethyl,glycyloxymethyl, phenylglycyloxymethyl,(5-methyl-2-oxo-1,3-dioxolen-4-yl)-methyl), and other well knownphysiologically hydrolyzable esters used, for example, in the penicillinand cephalosporin arts. Such esters may be prepared by conventionaltechniques known in the art. The “prodrug esters” can be formed byreacting the carboxylic acid moiety of the compounds of the presentinvention with either alkyl or aryl alcohol, halide, or sulfonateemploying procedures known to those skilled in the art. Such esters maybe prepared by conventional techniques known in the art.

Preparation of prodrugs is well known in the art and described in, forexample, King, F. D., ed., Medicinal Chemistry: Principles and Practice,The Royal Society of Chemistry, Cambridge, UK (1994); Testa, B. et al.,Hydrolysis in Drug and Prodrug Metabolism. Chemistry, Biochemistry andEnzymology, VCHA and Wiley-VCH, Zurich, Switzerland (2003); Wermuth, C.G., ed., The Practice of Medicinal Chemistry, Academic Press, San Diego,Calif. (1999).

The present invention is intended to include all isotopes of atomsoccurring in the present compounds. Isotopes include those atoms havingthe same atomic number but different mass numbers. By way of generalexample and without limitation, isotopes of hydrogen include deuteriumand tritium. Deuterium has one proton and one neutron in its nucleus andthat has twice the mass of ordinary hydrogen. Deuterium can berepresented by symbols such as “²H” or “D”. The term “deuterated”herein, by itself or used to modify a compound or group, refers toreplacement of one or more hydrogen atom(s), which is attached tocarbon(s), with a deuterium atom. Isotopes of carbon include ¹³C and¹⁴C.

Isotopically-labeled compounds of the invention can generally beprepared by conventional techniques known to those skilled in the art orby processes analogous to those described herein, using an appropriateisotopically-labeled reagent in place of the non-labeled reagentotherwise employed. Such compounds have a variety of potential uses,e.g., as standards and reagents in determining the ability of apotential pharmaceutical compound to bind to target proteins orreceptors, or for imaging compounds of this invention bound tobiological receptors in vivo or in vitro.

“Stable compound” and “stable structure” are meant to indicate acompound that is sufficiently robust to survive isolation to a usefuldegree of purity from a reaction mixture, and formulation into anefficacious therapeutic agent. It is preferred that compounds of thepresent invention do not contain a N-halo, S(O)₂H, or S(O)H group.

The term “solvate” means a physical association of a compound of thisinvention with one or more solvent molecules, whether organic orinorganic. This physical association includes hydrogen bonding. Incertain instances the solvate will be capable of isolation, for example,when one or more solvent molecules are incorporated in the crystallattice of the crystalline solid. The solvent molecules in the solvatemay be present in a regular arrangement and/or a non-orderedarrangement. The solvate may comprise either a stoichiometric ornonstoichiometric amount of the solvent molecules. “Solvate” encompassesboth solution-phase and isolable solvates. Exemplary solvates include,but are not limited to, hydrates, ethanolates, methanolates, andisopropanolates. Methods of solvation are generally known in the art.

ABBREVIATIONS

Abbreviations as used herein, are defined as follows: “1×” for once,“2×” for twice, “3×” for thrice, “° C.” for degrees Celsius, “eq” forequivalent or equivalents, “g” for gram or grams, “mg” for milligram ormilligrams, “L” for liter or liters, “mL” for milliliter or milliliters,“μL” for microliter or microliters, “N” for normal, “M” for molar,“mmol” for millimole or millimoles, “min” for minute or minutes, “h” forhour or hours, “rt” for room temperature, “RT” for retention time, “RBF”for round bottom flask, “atm” for atmosphere, “psi” for pounds persquare inch, “conc.” for concentrate, “RCM” for ring-closing metathesis,“sat” or “sat'd” for saturated, “SFC” for supercritical fluidchromatography “MW” for molecular weight, “mp” for melting point, “ee”for enantiomeric excess, “MS” or “Mass Spec” for mass spectrometry,“ESI” for electrospray ionization mass spectroscopy, “HR” for highresolution, “HRMS” for high resolution mass spectrometry, “LCMS” forliquid chromatography mass spectrometry, “HPLC” for high pressure liquidchromatography, “RP HPLC” for reverse phase HPLC, “TLC” or “tlc” forthin layer chromatography, “NMR” for nuclear magnetic resonancespectroscopy, “nOe” for nuclear Overhauser effect spectroscopy, “¹H” forproton, “S” for delta, “s” for singlet, “d” for doublet, “t” fortriplet, “q” for quartet, “m” for multiplet, “br” for broad, “Hz” forhertz, and “α”, “β”, “γ”, “R”, “S”, “E”, and “Z” are stereochemicaldesignations familiar to one skilled in the art.

-   Me methyl-   Et ethyl-   Pr propyl-   i-Pr isopropyl-   Bu butyl-   i-Bu isobutyl-   t-Bu tert-butyl-   Ph phenyl-   Bn benzyl-   Boc or BOC tert-butyloxycarbonyl-   Boc₂O di-tert-butyl dicarbonate-   AcOH or HOAc acetic acid-   AlCl₃ aluminum trichloride-   AIBN Azobis-isobutyronitrile-   BBr₃ boron tribromide-   BCl₃ boron trichloride-   BEMP    2-tert-butylimino-2-diethylamino-1,3-dimethylperhydro-1,3,2-diazaphosphorine-   BOP reagent benzotriazol-1-yloxytris(dimethylamino)phosphonium    hexafluorophosphate-   Burgess reagent 1-methoxy-N-triethylammoniosulfonyl-methanimidate-   CBz carbobenzyloxy-   DCM or CH₂Cl₂ dichloromethane-   CH₃CN or ACN acetonitrile-   CDCl₃ deutero-chloroform-   CHCl₃ chloroform-   mCPBA or m-CPBA meta-chloroperbenzoic acid-   Cs₂CO₃ cesium carbonate-   Cu(OAc)₂ copper (II) acetate-   Cy₂NMe N-cyclohexyl-N-methylcyclohexanamine-   DBU 1,8-diazabicyclo[5.4.0]undec-7-ene-   DCE 1,2 dichloroethane-   DEA Diethylamine-   DEAD Diethyl azodicarboxylate-   Dess-Martin    1,1,1-tris(acetyloxy)-1,1-dihydro-1,2-benziodoxol-3-(1H)-one-   DIAD Diisopropyl azodicarboxylate-   DIBALH Diisobutyl aluminum hydride-   DIC or DIPCDI diisopropylcarbodiimide-   DIEA, DIPEA or diisopropylethylamine

Hunig's Base

-   DMAP 4-dimethylaminopyridine-   DME 1,2-dimethoxyethane-   DMF dimethyl formamide-   DMSO dimethyl sulfoxide-   cDNA complementary DNA-   Dppp (R)-(+)-1,2-bis(diphenylphosphino)propane-   DuPhos (+)-1,2-bis((2S,5S)-2,5-diethylphospholano)benzene-   EDC N-(3-dimthylaminopropyl)-N′-ethylcarbodiimide-   EDCI N-(3-dimthylaminopropyl)-N′-ethylcarbodiimide hydrochloride-   EDTA ethylenediaminetetraacetic acid-   (S,S)-EtDuPhosRh(I)    (+)-1,2-bis((2S,5S)-2,5-diethylphospholano)benzene(1,5-cyclooctadiene)rhodium(I)    trifluoromethanesulfonate-   Et₃N or TEA triethylamine-   EtOAc ethyl acetate-   Et₂O diethyl ether-   EtOH ethanol-   GMF glass microfiber filter-   Grubbs II    (1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro    (phenylmethylene)(triycyclohexylphosphine)ruthenium-   HCl hydrochloric acid-   HATU O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium    hexafluorophosphate-   HEPES 4-(2-hydroxyethyl)piperaxine-1-ethanesulfonic acid-   Hex hexane-   HOBt or HOBT 1-hydroxybenzotriazole-   H₂O₂ hydrogen peroxide-   IBX 2-iodoxybenzoic acid-   H₂SO₄ sulfuric acid-   Jones reagent CrO₃ in aqueous H₂SO₄, 2 M solution-   K₂CO₃ potassium carbonate-   K₂HPO₄ potassium phosphate dibasic (potassium hydrogen phosphate)-   KOAc potassium acetate-   K₃PO₄ potassium phosphate tribasic-   LAH lithium aluminum hydride-   LG leaving group-   LiOH lithium hydroxide-   MeOH methanol-   MgSO₄ magnesium sulfate-   MsOH or MSA methylsulfonic acid/methanesulfonic acid-   NaCl sodium chloride-   NaH sodium hydride-   NaHCO₃ sodium bicarbonate-   Na₂CO₃ sodium carbonate-   NaOH sodium hydroxide-   Na₂SO₃ sodium sulfite-   Na₂SO₄ sodium sulfate-   NBS N-bromosuccinimide-   NCS N-chlorosuccinimide-   NH₃ ammonia-   NH₄Cl ammonium chloride-   NH₄OH ammonium hydroxide-   NH₄ ⁺HCO₂ ⁻ ammonium formate-   NMM N-methylmorpholine-   OTf triflate or trifluoromethanesulfonate-   Pd₂(dba)₃ tris(dibenzylideneacetone)dipalladium(O)-   Pd(OAc)₂ palladium(II) acetate-   Pd/C palladium on carbon-   Pd(dppf)Cl₂    [1,1′-bis(diphenylphosphino)-ferrocene]dichloropalladium(II)-   Ph₃PCl₂ triphenylphosphine dichloride-   PG protecting group-   POCl₃ phosphorus oxychloride-   PPTS pyridinium p-toluenesulfonate-   i-PrOH or IPA isopropanol-   PS Polystyrene-   RT or rt room temperature-   SEM-Cl 2-(trimethysilyl)ethoxymethyl chloride-   SiO₂ silica oxide-   SnCl₂ tin(II) chloride-   TBAF tra-n-butylammonium fluoride-   TBAI tetra-n-butylammonium iodide-   TFA trifluoroacetic acid-   THE tetrahydrofuran-   THP tetrahydropyran-   TMSCHN₂ Trimethylsilyldiazomethane-   TMSCH₂N₃ Trimethylsilylmethyl azide-   T3P propane phosphonic acid anhydride-   TRIS tris (hydroxymethyl) aminomethane-   pTsOH p-toluenesulfonic acid

IV. Biology

Lysophospholipids are membrane-derived bioactive lipid mediators.Lysophospholipids include, but are not limited to, lysophosphatidic acid(1-acyl-2-hydroxy-sn-glycero-3-phosphate; LPA), sphingosine 1-phosphate(S1P), lysophosphatidylcholine (LPC), and sphingosylphosphorylcholine(SPC). Lysophospholipids affect fundamental cellular functions thatinclude cellular proliferation, differentiation, survival, migration,adhesion, invasion, and morphogenesis. These functions influence manybiological processes that include neurogenesis, angiogenesis, woundhealing, immunity, and carcinogenesis.

LPA acts through sets of specific G protein-coupled receptors (GPCRs) inan autocrine and paracrine fashion. LPA binding to its cognate GPCRs(LPA₁, LPA₂, LPA₃, LPA₄, LPA₅, LPA₆) activates intracellular signalingpathways to produce a variety of biological responses.

Lysophospholipids, such as LPA, are quantitatively minor lipid speciescompared to their major phospholipid counterparts (e.g.,phosphatidylcholine, phosphatidylethanolamine, and sphingomyelin). LPAhas a role as a biological effector molecule, and has a diverse range ofphysiological actions such as, but not limited to, effects on bloodpressure, platelet activation, and smooth muscle contraction, and avariety of cellular effects, which include cell growth, cell rounding,neurite retraction, and actin stress fiber formation and cell migration.The effects of LPA are predominantly receptor mediated.

Activation of the LPA receptors (LPA₁, LPA₂, LPA₃, LPA₄, LPA₅, LPA₆)with LPA mediates a range of downstream signaling cascades. Theseinclude, but are not limited to, mitogen-activated protein kinase (MAPK)activation, adenylyl cyclase (AC) inhibition/activation, phospholipase C(PLC) activation/Ca²⁺ mobilization, arachidonic acid release, Akt/PKBactivation, and the activation of small GTPases, Rho, ROCK, Rac, andRas. Other pathways that are affected by LPA receptor activationinclude, but are not limited to, cyclic adenosine monophosphate (cAMP),cell division cycle 42/GTP-binding protein (Cdc42), proto-oncogeneserine/threonine-protein kinase Raf (c-RAF), proto-oncogenetyrosine-protein kinase Src (c-src), extracellular signal-regulatedkinase (ERK), focal adhesion kinase (FAK), guanine nucleotide exchangefactor (GEF), glycogen synthase kinase 3b (GSK3b), c-jun amino-terminalkinase (JNK), MEK, myosin light chain II (MLC II), nuclear factor kB(NF-kB), N-methyl-D-aspartate (NMDA) receptor activation,phosphatidylinositol 3-kinase (PI3K), protein kinase A (PKA), proteinkinase C (PKC), ras-related C3 botulinum toxin substrate 1 (RAC1). Theactual pathway and realized end point are dependent on a range ofvariables that include receptor usage, cell type, expression level of areceptor or signaling protein, and LPA concentration. Nearly allmammalian cells, tissues and organs co-express several LPA-receptorsubtypes, which indicates that LPA receptors signal in a cooperativemanner. LPA₁, LPA₂, and LPA₃ share high amino acid sequence similarity.

LPA is produced from activated platelets, activated adipocytes, neuronalcells, and other cell types. Serum LPA is produced by multiple enzymaticpathways that involve monoacylglycerol kinase, phospholipase A₁,secretory phospholipase A₂, and lysophospholipase D (lysoPLD), includingautotaxin. Several enzymes are involved in LPA degradation:lysophospholipase, lipid phosphate phosphatase, and LPA acyl transferasesuch as endophilin. LPA concentrations in human serum are estimated tobe 1-5 μM. Serum LPA is bound to albumin, low-density lipoproteins, orother proteins, which possibly protect LPA from rapid degradation. LPAmolecular species with different acyl chain lengths and saturation arenaturally occurring, including 1-palmitoyl (16:0), 1-palmitoleoyl(16:1), 1-stearoyl (18:0), 1-oleoyl (18:1), 1-linoleoyl (18:2), and1-arachidonyl (20:4) LPA. Quantitatively minor alkyl LPA has biologicalactivities similar to acyl LPA, and different LPA species activate LPAreceptor subtypes with varied efficacies.

LPA Receptors

LPA₁ (previously called VZG-1/EDG-2/mrec1.3) couples with three types ofG proteins, G_(i/o), G_(q), and G_(12/13). Through activation of these Gproteins, LPA induces a range of cellular responses through LPA₁including but not limited to: cell proliferation, serum-response element(SRE) activation, mitogen-activated protein kinase (MAPK) activation,adenylyl cyclase (AC) inhibition, phospholipase C (PLC) activation, Ca²⁺mobilization, Akt activation, and Rho activation.

Wide expression of LPA₁ is observed in adult mice, with clear presencein testis, brain, heart, lung, small intestine, stomach, spleen, thymus,and skeletal muscle. Similarly, human tissues also express LPA₁; it ispresent in brain, heart, lung, placenta, colon, small intestine,prostate, testis, ovary, pancreas, spleen, kidney, skeletal muscle, andthymus.

LPA₂ (EDG-4) also couples with three types of G proteins, G_(i/o),G_(q), and G_(12/13), to mediate LPA-induced cellular signaling.Expression of LPA₂ is observed in the testis, kidney, lung, thymus,spleen, and stomach of adult mice and in the human testis, pancreas,prostate, thymus, spleen, and peripheral blood leukocytes. Expression ofLPA₂ is upregulated in various cancer cell lines, and several human LPA₂transcriptional variants with mutations in the 3-untranslated regionhave been observed. Targeted deletion of LPA₂ in mice has not shown anyobvious phenotypic abnormalities, but has demonstrated a significantloss of normal LPA signaling (e.g., PLC activation, Ca²⁺ mobilization,and stress fiber formation) in primary cultures of mouse embryonicfibroblasts (MEFs). Creation of lpa1(−/−) lpa2 (−/−) double-null micehas revealed that many LPA-induced responses, which include cellproliferation, AC inhibition, PLC activation, Ca²⁺ mobilization, JNK andAkt activation, and stress fiber formation, are absent or severelyreduced in double-null MEFs. All these responses, except for ACinhibition (AC inhibition is nearly abolished in LPA₁ (−/−) MEFs), areonly partially affected in either LPA₁ (−/−) or LPA₂ (−/−) MEFs. LPA₂contributes to normal LPA-mediated signaling responses in at least somecell types (Choi et al, Biochemica et Biophysica Acta 2008, 1781, p531-539).

LPA₃ (EDG-7) is distinct from LPA₁ and LPA₂ in its ability to couplewith G_(i/o) and G_(q) but not G_(12/13) and is much less responsive toLPA species with saturated acyl chains. LPA₃ can mediate pleiotropicLPA-induced signaling that includes PLC activation, Ca²⁺ mobilization,AC inhibition/activation, and MAPK activation. Overexpression of LPA₃ inneuroblastoma cells leads to neurite elongation, whereas that of LPA₁ orLPA₂ results in neurite retraction and cell rounding when stimulatedwith LPA. Expression of LPA₃ is observed in adult mouse testis, kidney,lung, small intestine, heart, thymus, and brain. In humans, it is foundin the heart, pancreas, prostate, testis, lung, ovary, and brain(frontal cortex, hippocampus, and amygdala).

LPA₄ (p2y₉/GPR23) is of divergent sequence compared to LPA₁, LPA₂, andLPA₃ with closer similarity to the platelet-activating factor (PAF)receptor. LPA₄ mediates LPA induced Ca²⁺ mobilization and cAMPaccumulation, and functional coupling to the G protein Gs for ACactivation, as well as coupling to other G proteins. The LPA₄ gene isexpressed in the ovary, pancreas, thymus, kidney and skeletal muscle.

LPA₅ (GPR92) is a member of the purinocluster of GPCRs and isstructurally most closely related to LPA₄. LPA₅ is expressed in humanheart, placenta, spleen, brain, lung and gut. LPA₅ also shows very highexpression in the CD8+ lymphocyte compartment of the gastrointestinaltract.

LPA₆ (p2y5) is a member of the purinocluster of GPCRs and isstructurally most closely related to LPA₄. LPA₆ is an LPA receptorcoupled to the G12/13-Rho signaling pathways and is expressed in theinner root sheaths of human hair follicles.

Illustrative Biological Activity

Wound Healing

Normal wound healing occurs by a highly coordinated sequence of eventsin which cellular, soluble factors and matrix components act in concertto repair the injury. The healing response can be described as takingplace in four broad, overlapping phases—hemostasis, inflammation,proliferation, and remodeling. Many growth factors and cytokines arereleased into a wound site to initiate and perpetuate wound healingprocesses.

When wounded, damaged blood vessels activate platelets. The activatedplatelets play pivotal roles in subsequent repair processes by releasingbioactive mediators to induce cell proliferation, cell migration, bloodcoagulation, and angiogenesis. LPA is one such mediator that is releasedfrom activated platelets; this induces platelet aggregation along withmitogenic/migration effects on the surrounding cells, such asendothelial cells, smooth muscle cells, fibroblasts, and keratinocytes.

Topical application of LPA to cutaneous wounds in mice promotes repairprocesses (wound closure and increased neoepithelial thickness) byincreasing cell proliferation/migration without affecting secondaryinflammation.

Activation of dermal fibroblasts by growth factors and cytokines leadsto their subsequent migration from the edges of the wound into theprovisional matrix formed by the fibrin clot whereupon the fibroblastsproliferate and start to restore the dermis by secreting and organizingthe characteristic dermal extracellular matrix (ECM). The increasingnumber of fibroblasts within the wound and continuous precipitation ofECM enhances matrix rigidity by applying small tractional forces to thenewly formed granulation tissue. The increase in mechanical stress, inconjunction with transforming growth factor β (TGFβ), induces α-smoothmuscle actin (α-SMA) expression and the subsequent transformation offibroblasts into myofibroblasts. Myofibroblasts facilitate granulationtissue remodeling via myofibroblast contraction and through theproduction of ECM components.

LPA regulates many important functions of fibroblasts in wound healing,including proliferation, migration, differentiation and contraction.Fibroblast proliferation is required in wound healing in order to fillan open wound. In contrast, fibrosis is characterized by intenseproliferation and accumulation of myofibroblasts that activelysynthesize ECM and proinflammatory cytokines. LPA can either increase orsuppress the proliferation of cell types important in wound healing,such as epithelial and endothelial cells (EC), macrophages,keratinocytes, and fibroblasts. A role for LPA₁ in LPA-inducedproliferation was provided by the observation that LPA-stimulatedproliferation of fibroblasts isolated from LPA₁ receptor null mice wasattenuated (Mills et al, Nat Rev. Cancer 2003; 3: 582-591). LPA inducescytoskeletal changes that are integral to fibroblast adhesion,migration, differentiation and contraction.

Fibrosis

Tissue injury initiates a complex series of host wound-healingresponses; if successful, these responses restore normal tissuestructure and function. If not, these responses can lead to tissuefibrosis and loss of function.

For the majority of organs and tissues the development of fibrosisinvolves a multitude of events and factors. Molecules involved in thedevelopment of fibrosis include proteins or peptides (profibroticcytokines, chemokines, metalloproteinases etc.) and phospholipids.Phospholipids involved in the development of fibrosis include plateletactivating factor (PAF), phosphatidyl choline, sphingosine-1 phosphate(S1P) and lysophosphatidic acid (LPA).

A number of muscular dystrophies are characterized by a progressiveweakness and wasting of musculature, and by extensive fibrosis. It hasbeen shown that LPA treatment of cultured myoblasts induced significantexpression of connective tissue growth factor (CTGF). CTGF subsequentlyinduces collagen, fibronectin and integrin expression and inducesdedifferentiation of these myoblasts. Treatment of a variety of celltypes with LPA induces reproducible and high level induction of CTGF (J.P. Pradere, et al., LPA₁ receptor activation promotes renal interstitialfibrosis, J. Am. Soc. Nephrol. 18 (2007) 3110-3118; N. Wiedmaier, etal., Int J Med Microbiol; 298(3-4):231-43, 2008). CTGF is a profibroticcytokine, signaling down-stream and in parallel with TGFβ.

CTGF expression by gingival epithelial cells, which are involved in thedevelopment of gingival fibromatosis, was found to be exacerbated by LPAtreatment (A. Kantarci, et al., J. Pathol. 210 (2006) 59-66).

LPA is associated with the progression of liver fibrosis. In vitro, LPAinduces stellate cell and hepatocyte proliferation. These activatedcells are the main cell type responsible for the accumulation of ECM inthe liver. Furthermore, LPA plasma levels rise during CCl₄-induced liverfibrosis in rodents, or in hepatitis C virus-induced liver fibrosis inhumans (N. Watanabe, et al., Plasma lysophosphatidic acid level andserum autotaxin activity are increased in liver injury in rats inrelation to its severity, Life Sci. 81 (2007) 1009-1015; N. Watanabe, etal., J. Clin. Gastroenterol. 41 (2007) 616-623).

An increase of phospholipid concentrations in the bronchoalveolar lavagefluid in rabbits and rodents injected with bleomycin has been reported(K. Kuroda, et al., Phospholipid concentration in lung lavage fluid asbiomarker for pulmonary fibrosis, Inhal. Toxicol. 18 (2006) 389-393; K.Yasuda, et al., Lung 172 (1994) 91-102).

LPA is associated with heart disease and mycocardial remodeling. SerumLPA levels are increased after myocardial infarction in patients and LPAstimulates rat cardiac fibroblast proliferation and collagen production(Chen et al. FEBS Lett. 2006 Aug. 21; 580(19):4737-45).

Pulmonary Fibrosis

In the lung, aberrant wound healing responses to injury contribute tothe pathogenesis of fibrotic lung diseases. Fibrotic lung diseases, suchas idiopathic pulmonary fibrosis (IPF), are associated with highmorbidity and mortality.

LPA is an important mediator of fibroblast recruitment in pulmonaryfibrosis. LPA and LPA₁ play key pathogenic roles in pulmonary fibrosis.Fibroblast chemoattractant activity plays an important role in the lungsin patients with pulmonary fibrosis. Profibrotic effects ofLPA₁-receptor stimulation is explained by LPA₁-receptor-mediatedvascular leakage and increased fibroblast recruitment, both profibroticevents. The LPA-LPA₁ pathway has a role in mediating fibroblastmigration and vascular leakage in IPF. The end result is the aberranthealing process that characterizes this fibrotic condition.

The LPA₁ receptor is the LPA receptor most highly expressed onfibroblasts obtained from patients with IPF. Furthermore, BAL obtainedfrom IPF patients induced chemotaxis of human foetal lung fibroblaststhat was blocked by the dual LPA₁-LPA₃ receptor antagonist Ki16425. Inan experimental bleomycin-induced lung injury mouse model, it was shownthat LPA levels were high in bronchoalveolar lavage samples comparedwith unexposed controls. LPA₁ knockout mice are protected from fibrosisafter bleomycin challenge with reduced fibroblast accumulation andvascular leakage. In human subjects with IPF, high LPA levels wereobserved in bronchoalveolar lavage samples compared with healthycontrols. Increased fibroblast chemotactic activity in these samples wasinhibited by the Ki16425 indicating that fibroblast migration ismediated by the LPA-LPA receptor(s) pathway (Tager et al. NatureMedicine, 2008, 14, 45-54).

The LPA-LPA₁ pathway is crucial in fibroblast recruitment and vascularleakage in pulmonary fibrosis.

Activation of latent TGF-β by the αvβ6 integrin plays a critical role inthe development of lung injury and fibrosis (Munger et al. Cell, vol.96, 319-328, 1999). LPA induces αvβ6-mediated TGF-β activation on humanlung epithelial cells (Xu et al. Am. J. Pathology, 2009, 174,1264-1279). The LPA-induced αvβ6-mediated TGF-β activation is mediatedby the LPA2 receptor. Expression of the LPA2 receptor is increased inepithelial cells and mesenchymal cells in areas of lung fibrosis fromIPF patients compared to normal human lung tissue. The LPA-LPA2 pathwaycontributes to the activation of the TGF-β pathway in pulmonaryfibrosis. In some embodiments, compounds that inhibit LPA2 show efficacyin the treatment of lung fibrosis. In some embodiments, compounds thatinhibit both LPA1 and LPA2 show improved efficacy in the treatment oflung fibrosis compared to compounds which inhibit only LPA1 or LPA2.

Renal Fibrosis

LPA and LPA₁ are involved in the etiology of kidney fibrosis. LPA haseffects on both proliferation and contraction of glomerular mesangialcells and thus has been implicated in proliferative glomerulonephritis(C. N. Inoue, et al., Clin. Sci. (Colch.) 1999, 96, 431-436). In ananimal model of renal fibrosis [unilateral ureteral obstruction (UUO)],it was found that renal LPA receptors are expressed under basalconditions with an expression order of LPA₂>LPA₃=LPA₁>>LPA₄. This modelmimics in an accelerated manner the development of renal fibrosisincluding renal inflammation, fibroblast activation and accumulation ofextracellular matrix in the tubulointerstitium. UUO significantlyinduced LPA₁-receptor expression. This was paralleled by renal LPAproduction (3.3 fold increase) in conditioned media from kidneyexplants. Contra-lateral kidneys exhibited no significant changes in LPArelease and LPA-receptors expression. This shows that a prerequisite foran action of LPA in fibrosis is met: production of a ligand (LPA) andinduction of one of its receptors (the LPA₁ receptor) (J. P. Pradere etal., Biochimica et Biophysica Acta, 2008, 1781, 582-587).

In mice where the LPA₁ receptor was knocked out (LPA₁ (−/−), thedevelopment of renal fibrosis was significantly attenuated. UUO micetreated with the LPA receptor antagonist Ki16425 closely resembled theprofile of LPA₁ (−/−) mice.

LPA can participate in intraperitonial accumulation ofmonocyte/macrophages and LPA can induce expression of the profibroticcytokine CTGF in primary cultures of human fibroblasts (J. S. Koh, etal., J. Clin. Invest., 1998, 102, 716-727).

LPA treatment of a mouse epithelial renal cell line, MCT, induced arapid increase in the expression of the profibrotic cytokine CTGF. CTGFplays a crucial role in UUO-induced tubulointerstitial fibrosis (TIF),and is involved in the profibrotic activity of TGFβ. This induction wasalmost completely suppressed by co-treatment with the LPA-receptorantagonist Ki16425. In one aspect, the profibrotic activity of LPA inkidney results from a direct action of LPA on kidney cells involvinginduction of CTGF.

Hepatic Fibrosis

LPA is implicated in liver disease and fibrosis. Plasma LPA levels andserum autotaxin (enzyme responsible for LPA production) are elevated inhepatitis patients and animal models of liver injury in correlation withincreased fibrosis. LPA also regulates liver cell function. LPA₁ andLPA₂ receptors are expressed by mouse hepatic stellate cells and LPAstimulates migration of hepatic myofibroblasts.

Ocular Fibrosis

LPA is in involved in wound healing in the eye. LPA₁ and LPA₃ receptorsare detectable in the normal rabbit corneal epithelial cells,keratocytes and endothelial cells and LPA₁ and LPA₃ expression areincreased in corneal epithelial cells following injury.

LPA and its homologues are present in the aqueous humor and the lacrimalgland fluid of the rabbit eye and these levels are increased in a rabbitcorneal injury model.

LPA induces actin stress fiber formation in rabbit corneal endothelialand epithelial cells and promotes contraction corneal fibroblasts. LPAalso stimulates proliferation of human retinal pigmented epithelialcells

Cardiac Fibrosis

LPA is implicated in myocardial infarction and cardiac fibrosis. SerumLPA levels are increased in patients following mycocardial infarction(MI) and LPA stimulates proliferation and collagen production (fibrosis)by rat cardiac fibroblasts. Both LPA1 and LPA3 receptors are highlyexpressed in human heart tissue.

Treatment of Fibrosis

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used to treat or preventfibrosis in a mammal. In one aspect, a compound of Formulas (I), or apharmaceutically acceptable salt thereof, is used to treat fibrosis ofan organ or tissue in a mammal. In one aspect is a method for preventinga fibrosis condition in a mammal, the method comprising administering tothe mammal at risk of developing one or more fibrosis conditions atherapeutically effective amount of a compound of Formulas (I), or apharmaceutically acceptable salt thereof. In one aspect, the mammal hasbeen exposed to one or more environmental conditions that are known toincrease the risk of fibrosis of an organ or tissue. In one aspect, themammal has been exposed to one or more environmental conditions that areknown to increase the risk of lung, liver or kidney fibrosis. In oneaspect, the mammal has a genetic predisposition of developing fibrosisof an organ or tissue. In one aspect, a compound of the presentinvention, or a pharmaceutically acceptable salt thereof, isadministered to a mammal to prevent or minimize scarring followinginjury. In one aspect, injury includes surgery.

The terms “fibrosis” or “fibrosing disorder,” as used herein, refers toconditions that are associated with the abnormal accumulation of cellsand/or fibronectin and/or collagen and/or increased fibroblastrecruitment and include but are not limited to fibrosis of individualorgans or tissues such as the heart, kidney, liver, joints, lung,pleural tissue, peritoneal tissue, skin, cornea, retina, musculoskeletaland digestive tract.

Exemplary diseases, disorders, or conditions that involve fibrosisinclude, but are not limited to: Lung diseases associated with fibrosis,e.g., idiopathic pulmonary fibrosis, pulmonary fibrosis secondary tosystemic inflammatory disease such as rheumatoid arthritis, scleroderma,lupus, cryptogenic fibrosing alveolitis, radiation induced fibrosis,chronic obstructive pulmonary disease (COPD), scleroderma, chronicasthma, silicosis, asbestos induced pulmonary or pleural fibrosis, acutelung injury and acute respiratory distress (including bacterialpneumonia induced, trauma induced, viral pneumonia induced, ventilatorinduced, non-pulmonary sepsis induced, and aspiration induced); Chronicnephropathies associated with injury/fibrosis (kidney fibrosis), e.g.,glomerulonephritis secondary to systemic inflammatory diseases such aslupus and scleroderma, diabetes, glomerular nephritis, focal segmentalglomerular sclerosis, IgA nephropathy, hypertension, allograft andAlport; Gut fibrosis, e.g., scleroderma, and radiation induced gutfibrosis; Liver fibrosis, e.g., cirrhosis, alcohol induced liverfibrosis, nonalcoholic steatohepatitis (NASH), biliary duct injury,primary biliary cirrhosis, infection or viral induced liver fibrosis(e.g., chronic HCV infection), and autoimmune hepatitis; Head and neckfibrosis, e.g., radiation induced; Corneal scarring, e.g., LASIK(laser-assisted in situ keratomileusis), corneal transplant, andtrabeculectomy; Hypertrophic scarring and keloids, e.g., burn induced orsurgical; and other fibrotic diseases, e.g., sarcoidosis, scleroderma,spinal cord injury/fibrosis, myelofibrosis, vascular restenosis,atherosclerosis, arteriosclerosis, Wegener's granulomatosis, mixedconnective tissue disease, and Peyronie's disease.

In one aspect, a mammal suffering from one of the following non-limitingexemplary diseases, disorders, or conditions will benefit from therapywith a compound of the present invention, or a pharmaceuticallyacceptable salt thereof: atherosclerosis, thrombosis, heart disease,vasculitis, formation of scar tissue, restenosis, phlebitis, COPD(chronic obstructive pulmonary disease), pulmonary hypertension,pulmonary fibrosis, pulmonary inflammation, bowel adhesions, bladderfibrosis and cystitis, fibrosis of the nasal passages, sinusitis,inflammation mediated by neutrophils, and fibrosis mediated byfibroblasts.

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is administered to a mammalwith fibrosis of an organ or tissue or with a predisposition ofdeveloping fibrosis of an organ or tissue with one or more other agentsthat are used to treat fibrosis. In one aspect, the one or more agentsinclude corticosteroids. In one aspect, the one or more agents includeimmunosuppressants. In one aspect, the one or more agents include B-cellantagonists. In one aspect, the one or more agents include uteroglobin.

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used to treat adermatological disorders in a mammal. The term “dermatologicaldisorder,” as used herein refers to a skin disorder. Such dermatologicaldisorders include, but are not limited to, proliferative or inflammatorydisorders of the skin such as, atopic dermatitis, bullous disorders,collagenoses, psoriasis, scleroderma, psoriatic lesions, dermatitis,contact dermatitis, eczema, urticaria, rosacea, wound healing, scarring,hypertrophic scarring, keloids, Kawasaki Disease, rosacea,Sjogren-Larsso Syndrome, urticaria. In one aspect, a compound of thepresent invention, or a pharmaceutically acceptable salt thereof, isused to treat systemic sclerosis.

Pain

Since LPA is released following tissue injury, LPA₁ plays an importantrole in the initiation of neuropathic pain. LPA₁, unlike LPA₂ or LPA₃,is expressed in both dorsal root ganglion (DRG) and dorsal root neurons.Using the antisense oligodeoxynucleotide (AS-ODN) for LPA₁ and LPA₁-nullmice, it was found that LPA-induced mechanical allodynia andhyperalgesia is mediated in an LPA₁-dependent manner. LPA₁ anddownstream Rho-ROCK activation play a role in the initiation ofneuropathic pain signaling. Pretreatment with Clostridium botulinum C3exoenzyme (BoTXC3, Rho inhibitor) or Y-27632 (ROCK inhibitor) completelyabolished the allodynia and hyperalgesia in nerve-injured mice. LPA alsoinduced demyelination of the dorsal root, which was prevented by BoTXC3.The dorsal root demyelination by injury was not observed in LPA₁-nullmice or AS-ODN injected wild-type mice. LPA signaling appears to induceimportant neuropathic pain markers such as protein kinase Cγ (PKCγ) anda voltage-gated calcium channel α2δ1 subunit (Caα2δ1) in an LPA₁ andRho-dependent manner (M. Inoue, et al., Initiation of neuropathic painrequires lysophosphatidic acid receptor signaling, Nat. Med. 10 (2004)712-718).

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used in the treatment ofpain in a mammal. In one aspect, the pain is acute pain or chronic pain.In another aspect, the pain is neuropathic pain.

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used in the treatment offibromylagia. In one aspect, fibromyalgia stems from the formation offibrous scar tissue in contractile (voluntary) muscles. Fibrosis bindsthe tissue and inhibits blood flow, resulting in pain.

Cancer

Lysophospholipid receptor signaling plays a role in the etiology ofcancer. Lysophosphatidic acid (LPA) and its G protein-coupled receptors(GPCRs) LPA₁, LPA₂, and/or LPA₃ play a role in the development ofseveral types of cancers. The initiation, progression and metastasis ofcancer involve several concurrent and sequential processes includingcell proliferation and growth, survival and anti-apoptosis, migration ofcells, penetration of foreign cells into defined cellular layers and/ororgans, and promotion of angiogenesis. The control of each of theseprocesses by LPA signaling in physiological and pathophysiologicalconditions underscores the potential therapeutic usefulness ofmodulating LPA signaling pathways for the treatment of cancer,especially at the level of the LPA receptors or ATX/lysoPLD. Autotaxin(ATX) is a prometastatic enzyme initially isolated from the conditionedmedium of human melanoma cells that stimulates a myriad of biologicalactivities, including angiogenesis and the promotion of cell growth,migration, survival, and differentiation through the production of LPA(Mol Cancer Ther 2008; 7(10):3352-62).

LPA signals through its own GPCRs leading to activation of multipledownstream effector pathways. Such downstream effector pathways play arole in cancer. LPA and its GPCRs are linked to cancer through majoroncogenic signaling pathways.

LPA contributes to tumorigenesis by increasing motility and invasivenessof cells. LPA has been implicated in the initiation or progression ofovarian cancer. LPA is present at significant concentrations (2-80 μM)in the ascitic fluid of ovarian cancer patients. Ovarian cancer cellsconstitutively produce increased amounts of LPA as compared to normalovarian surface epithelial cells, the precursor of ovarian epithelialcancer. Elevated LPA levels are also detected in plasma from patientswith early-stage ovarian cancers compared with controls. LPA receptors(LPA2 and LPA3) are also overexpressed in ovarian cancer cells ascompared to normal ovarian surface epithelial cells. LPA stimulatesCox-2 expression through transcriptional activation andpost-transcriptional enhancement of Cox-2 mRNA in ovarian cancer cells.Prostaglandins produced by Cox-2 have been implicated in a number ofhuman cancers and pharmacological inhibition of Cox-2 activity reducescolon cancer development and decreases the size and number of adenomasin patients with familial adenomatous polyposis. LPA has also beenimplicated in the initiation or progression of prostate cancer, breastcancer, melanoma, head and neck cancer, bowel cancer (colorectalcancer), thyroid cancer and other cancers (Gardell et al, Trends inMolecular Medicine, vol. 12, no. 2, p 65-75, 2006; Ishii et al, Annu.Rev. Biochem, 73, 321-354, 2004; Mills et al., Nat. Rev. Cancer, 3,582-591, 2003; Murph et al., Biochimica et Biophysica Acta, 1781,547-557, 2008).

The cellular responses to LPA are mediated through the lysophosphatidicacid receptors. For example, LPA receptors mediate both migration of andinvasion by pancreatic cancer cell lines: an antagonist of LPA₁ and LPA₃(Ki16425) and LPA₁-specific siRNA effectively blocked in vitro migrationin response to LPA and peritoneal fluid (ascites) from pancreatic cancerpatients; in addition, Ki16425 blocked the LPA-induced andascites-induced invasion activity of a highly peritoneal metastaticpancreatic cancer cell line (Yamada et al, J. Biol. Chem., 279,6595-6605, 2004).

Colorectal carcinoma cell lines show significant expression of LPA₁ mRNAand respond to LPA by cell migration and production of angiogenicfactors. Overexpression of LPA receptors has a role in the pathogenesisof thyroid cancer. LPA₃ was originally cloned from prostate cancercells, concordant with the ability of LPA to induce autocrineproliferation of prostate cancer cells.

LPA has stimulatory roles in cancer progression in many types of cancer.LPA is produced from and induces proliferation of prostate cancer celllines. LPA induces human colon carcinoma DLD1 cell proliferation,migration, adhesion, and secretion of angiogenic factors through LPA₁signaling. In other human colon carcinoma cells lines (HT29 and WiDR),LPA enhances cell proliferation and secretion of angiogenic factors. Inother colon cancer cell lines, LPA2 and LPA3 receptor activation resultsin proliferation of the cells. The genetic or pharmacologicalmanipulation of LPA metabolism, specific blockade of receptor signaling,and/or inhibition of downstream signal transduction pathways, representapproaches for cancer therapies.

It has been reported that LPA and other phospholipids stimulateexpression of interleukin-8 (IL-8) in ovarian cancer cell lines. In someembodiments, high concentrations of IL-8 in ovarian cancer correlatewith poor initial response to chemotherapy and with poor prognosis,respectively. In animal models, expression of IL-8 and other growthfactors such as vascular endothelial growth factor (VEGF) is associatedwith increased tumorigenicity, ascites formation, angiogenesis, andinvasiveness of ovarian cancer cells. In some aspects, IL-8 is animportant modulator of cancer progression, drug resistance, andprognosis in ovarian cancer. In some embodiments, a compound of thepresent invention inhibits or reduces IL-8 expression in ovarian cancercell lines.

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used in the treatment ofcancer. In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used in the treatment ofmalignant and benign proliferative disease. In one aspect, a compound ofthe present invention, or a pharmaceutically acceptable salt thereof, isused to prevent or reduce proliferation of tumor cells, invasion andmetastasis of carcinomas, pleural mesothelioma (Yamada, Cancer Sci.,2008, 99(8), 1603-1610) or peritoneal mesothelioma, cancer pain, bonemetastases (Boucharaba et al, J. Clin. Invest., 2004, 114(12),1714-1725; Boucharaba et al, Proc. Natl. acad. Sci., 2006, 103(25)9643-9648). In one aspect is a method of treating cancer in a mammal,the method comprising administering to the mammal a compound of thepresent invention, or a pharmaceutically acceptable salt thereof, and asecond therapeutic agent, wherein the second therapeutic agent is ananti-cancer agent.

The term “cancer,” as used herein refers to an abnormal growth of cellswhich tend to proliferate in an uncontrolled way and, in some cases, tometastasize (spread). The types of cancer include, but is not limitedto, solid tumors (such as those of the bladder, bowel, brain, breast,endometrium, heart, kidney, lung, lymphatic tissue (lymphoma), ovary,pancreas or other endocrine organ (thyroid), prostate, skin (melanoma orbasal cell cancer) or hematological tumors (such as the leukemias) atany stage of the disease with or without metastases.

Additional non-limiting examples of cancers include, acute lymphoblasticleukemia, acute myeloid leukemia, adrenocortical carcinoma, anal cancer,appendix cancer, astrocytomas, atypical teratoid/rhabdoid tumor, basalcell carcinoma, bile duct cancer, bladder cancer, bone cancer(osteosarcoma and malignant fibrous histiocytoma), brain stem glioma,brain tumors, brain and spinal cord tumors, breast cancer, bronchialtumors, Burkitt lymphoma, cervical cancer, chronic lymphocytic leukemia,chronic myelogenous leukemia, colon cancer, colorectal cancer,craniopharyngioma, cutaneous T-Cell lymphoma, embryonal tumors,endometrial cancer, ependymoblastoma, ependymoma, esophageal cancer,ewing sarcoma family of tumors, eye cancer, retinoblastoma, gallbladdercancer, gastric (stomach) cancer, gastrointestinal carcinoid tumor,gastrointestinal stromal tumor (GIST), gastrointestinal stromal celltumor, germ cell tumor, glioma, hairy cell leukemia, head and neckcancer, hepatocellular (liver) cancer, Hodgkin lymphoma, hypopharyngealcancer, intraocular melanoma, islet cell tumors (endocrine pancreas),Kaposi sarcoma, kidney cancer, Langerhans cell histiocytosis, laryngealcancer, leukemia, Acute lymphoblastic leukemia, acute myeloid leukemia,chronic lymphocytic leukemia, chronic myelogenous leukemia, hairy cellleukemia, liver cancer, non-small cell lung cancer, small cell lungcancer, Burkitt lymphoma, cutaneous T-cell lymphoma, Hodgkin lymphoma,non-Hodgkin lymphoma, lymphoma, Waldenström macroglobulinemia,medulloblastoma, medulloepithelioma, melanoma, mesothelioma, mouthcancer, chronic myelogenous leukemia, myeloid leukemia, multiplemyeloma, nasopharyngeal cancer, neuroblastoma, non-Hodgkin lymphoma,non-small cell lung cancer, oral cancer, oropharyngeal cancer,osteosarcoma, malignant fibrous histiocytoma of bone, ovarian cancer,ovarian epithelial cancer, ovarian germ cell tumor, ovarian lowmalignant potential tumor, pancreatic cancer, papillomatosis,parathyroid cancer, penile cancer, pharyngeal cancer, pineal parenchymaltumors of intermediate differentiation, pineoblastoma and supratentorialprimitive neuroectodermal tumors, pituitary tumor, plasma cellneoplasm/multiple myeloma, pleuropulmonary blastoma, primary centralnervous system lymphoma, prostate cancer, rectal cancer, renal cell(kidney) cancer, retinoblastoma, rhabdomyosarcoma, salivary glandcancer, sarcoma, Ewing sarcoma family of tumors, sarcoma, kaposi, Sezarysyndrome, skin cancer, small cell Lung cancer, small intestine cancer,soft tissue sarcoma, squamous cell carcinoma, stomach (gastric) cancer,supratentorial primitive neuroectodermal tumors, T-cell lymphoma,testicular cancer, throat cancer, thymoma and thymic carcinoma, thyroidcancer, urethral cancer, uterine cancer, uterine sarcoma, vaginalcancer, vulvar cancer, Waldenström macroglobulinemia, Wilms tumor.

The increased concentrations of LPA and vesicles in ascites from ovariancancer patients and breast cancer effussions indicate that it could bean early diagnostic marker, a prognostic indicator or an indicator ofresponse to therapy (Mills et al, Nat. Rev. Cancer., 3, 582-591, 2003;Sutphen et al., Cancer Epidemiol. Biomarkers Prev. 13, 1185-1191, 2004).LPA concentrations are consistently higher in ascites samples than inmatched plasma samples.

Respiratory and Allergic Disorders

In one aspect, LPA is a contributor to the pathogenesis of respiratorydiseases. In one aspect the respiratory disease is asthma.Proinflammatory effects of LPA include degranulation of mast cells,contraction of smooth-muscle cells and release of cytokines fromdendritic cells. Airway smooth muscle cells, epithelial cells and lungfibroblasts all show responses to LPA. LPA induces the secretion of IL-8from human bronchial epithelial cells. IL-8 is found in increasedconcentrations in BAL fluids from patients with asthma, chronicobstructive lung disease, pulmonary sarcoidosis and acute respiratorydistress syndrome and Il-8 has been shown to exacerbate airwayinflammation and airway remodeling of asthmatics. LPA1, LPA2 and LPA3receptors have all been shown to contribute to the LPA-induced IL-8production. Studies cloning multiple GPCRs that are activated by LPAallowed the demonstration of the presence of mRNA for the LPA₁, LPA₂ andLPA₃ in the lung (J. J. A. Contos, et al., Mol. Pharmacol. 58,1188-1196, 2000).

The release of LPA from platelets activated at a site of injury and itsability to promote fibroblast proliferation and contraction are featuresof LPA as a mediator of wound repair. In the context of airway disease,asthma is an inflammatory disease where inappropriate airway “repair”processes lead to structural “remodeling” of the airway. In asthma, thecells of the airway are subject to ongoing injury due to a variety ofinsults, including allergens, pollutants, other inhaled environmentalagents, bacteria and viruses, leading to the chronic inflammation thatcharacterizes asthma.

In one aspect, in the asthmatic individual, the release of normal repairmediators, including LPA, is exaggerated or the actions of the repairmediators are inappropriately prolonged leading to inappropriate airwayremodeling. Major structural features of the remodeled airway observedin asthma include a thickened lamina reticularis (the basementmembrane-like structure just beneath the airway epithelial cells),increased numbers and activation of myofibroblasts, thickening of thesmooth muscle layer, increased numbers of mucus glands and mucussecretions, and alterations in the connective tissue and capillary bedthroughout the airway wall. In one aspect, LPA contributes to thesestructural changes in the airway. In one aspect, LPA is involved inacute airway hyperresponsiveness in asthma. The lumen of the remodeledasthmatic airway is narrower due to the thickening of the airway wall,thus decreasing airflow. In one aspect, LPA contributes to the long-termstructural remodeling and the acute hyperresponsiveness of the asthmaticairway. In one aspect, LPA contributes to the hyper-responsiveness thatis a primary feature of acute exacerbations of asthma.

In addition to the cellular responses mediated by LPA, several of theLPA signaling pathway components leading to these responses are relevantto asthma. EGF receptor upregulation is induced by LPA and is also seenin asthmatic airways (M. Amishima, et al., Am. J. Respir. Crit. CareMed. 157, 1907-1912, 1998). Chronic inflammation is a contributor toasthma, and several of the transcription factors that are activated byLPA are known to be involved in inflammation (Ediger et al., Eur RespirJ 21:759-769, 2003).

In one aspect, the fibroblast proliferation and contraction andextracellular matrix secretion stimulated by LPA contributes to thefibroproliferative features of other airway diseases, such as theperibronchiolar fibrosis present in chronic bronchitis, emphysema, andinterstitial lung disease. Emphysema is also associated with a mildfibrosis of the alveolar wall, a feature which is believed to representan attempt to repair alveolar damage. In another aspect, LPA plays arole in the fibrotic interstitial lung diseases and obliterativebronchiolitis, where both collagen and myofibroblasts are increased. Inanother aspect, LPA is involved in several of the various syndromes thatconstitute chronic obstructive pulmonary disease.

Administration of LPA in vivo induces airway hyper-responsiveness,itch-scratch responses, infiltration and activation of eosinophils andneutrophils, vascular remodeling, and nociceptive flexor responses. LPAalso induces histamine release from mouse and rat mast cells. In anacute allergic reaction, histamine induces various responses, such ascontraction of smooth muscle, plasma exudation, and mucus production.Plasma exudation is important in the airway, because the leakage andsubsequent airway-wall edema contribute to the development of airwayhyperresponsiveness. Plasma exudation progresses to conjunctivalswelling in ocular allergic disorder and nasal blockage in allergicrhinitis (Hashimoto et al., J Pharmacol Sci 100, 82-87, 2006). In oneaspect, plasma exudation induced by LPA is mediated by histamine releasefrom mast cells via one or more LPA receptors. In one aspect, the LPAreceptor(s) include LPA₁ and/or LPA₃. In one aspect, a compound of thepresent invention, or a pharmaceutically acceptable salt thereof, isused in the treatment of various allergic disorders in a mammal. In oneaspect, a compound of the present invention, or a pharmaceuticallyacceptable salt thereof, is used in the treatment of respiratorydiseases, disorders or conditions in a mammal. In one aspect, a compoundof the present invention, or a pharmaceutically acceptable salt thereof,is used in the treatment of asthma in a mammal. In one aspect, acompound of the present invention, or a pharmaceutically acceptable saltthereof, is used in the treatment of chronic asthma in a mammal.

The term “respiratory disease,” as used herein, refers to diseasesaffecting the organs that are involved in breathing, such as the nose,throat, larynx, eustachian tubes, trachea, bronchi, lungs, relatedmuscles (e.g., diaphram and intercostals), and nerves. Respiratorydiseases include, but are not limited to, asthma, adult respiratorydistress syndrome and allergic (extrinsic) asthma, non-allergic(intrinsic) asthma, acute severe asthma, chronic asthma, clinicalasthma, nocturnal asthma, allergen-induced asthma, aspirin-sensitiveasthma, exercise-induced asthma, isocapnic hyperventilation, child-onsetasthma, adult-onset asthma, cough-variant asthma, occupational asthma,steroid-resistant asthma, seasonal asthma, seasonal allergic rhinitis,perennial allergic rhinitis, chronic obstructive pulmonary disease,including chronic bronchitis or emphysema, pulmonary hypertension,interstitial lung fibrosis and/or airway inflammation and cysticfibrosis, and hypoxia.

The term “asthma” as used herein refers to any disorder of the lungscharacterized by variations in pulmonary gas flow associated with airwayconstriction of whatever cause (intrinsic, extrinsic, or both; allergicor non-allergic). The term asthma may be used with one or moreadjectives to indicate cause.

In one aspect, presented herein is the use of a compound of the presentinvention, or a pharmaceutically acceptable salt thereof, in thetreatment or prevention of chronic obstructive pulmonary disease in amammal comprising administering to the mammal at least once an effectiveamount of at least one compound of the present invention, or apharmaceutically acceptable salt thereof. In addition, chronicobstructive pulmonary disease includes, but is not limited to, chronicbronchitis or emphysema, pulmonary hypertension, interstitial lungfibrosis and/or airway inflammation, and cystic fibrosis.

Nervous System

The nervous system is a major locus for LPA₁ expression; there it isspatially and temporally regulated throughout brain development.Oligodendrocytes, the myelinating cells in the central nervous system(CNS), express LPA₁ in mammals. In addition, Schwann cells, themyelinating cells of the peripheral nervous system, also express LPA₁,which is involved in regulating Schwann cell survival and morphology.These observations identify important functions for receptor-mediatedLPA signaling in neurogenesis, cell survival, and myelination.

Exposure of peripheral nervous system cell lines to LPA produces a rapidretraction of their processes resulting in cell rounding, which was, inpart, mediated by polymerization of the actin cytoskeleton. In oneaspect, LPA causes neuronal degeneration under pathological conditionswhen the blood-brain barrier is damaged and serum components leak intothe brain (Moolenaar, Curr. Opin. Cell Biol. 7:203-10, 1995).Immortalized CNS neuroblast cell lines from the cerebral cortex alsodisplay retraction responses to LPA exposure through Rho activation andactomyosin interactions. In one aspect, LPA is associated withpost-ischemic neural damage (J. Neurochem. 61, 340, 1993; J. Neurochem.,70:66, 1998).

In one aspect, provided is a compound of the present invention, or apharmaceutically acceptable salt thereof, for use in the treatment orprevention of a nervous system disorder in a mammal. The term “nervoussystem disorder,” as used herein, refers to conditions that alter thestructure or function of the brain, spinal cord or peripheral nervoussystem, including but not limited to Alzheimer's Disease, cerebraledema, cerebral ischemia, stroke, multiple sclerosis, neuropathies,Parkinson's Disease, those found after blunt or surgical trauma(including post-surgical cognitive dysfunction and spinal cord or brainstem injury), as well as the neurological aspects of disorders such asdegenerative disk disease and sciatica.

In one aspect, provided is a compound of the present invention, or apharmaceutically acceptable salt thereof, for use in the treatment orprevention of a CNS disorder in a mammal. CNS disorders include, but arenot limited to, multiple sclerosis, Parkinson's disease, Alzheimer'sdisease, stroke, cerebral ischemia, retinal ischemia, post-surgicalcognitive dysfunction, migraine, peripheral neuropathy/neuropathic pain,spinal cord injury, cerebral edema and head injury.

Cardiovascular Disorders

Cardiovascular phenotypes observed after targeted deletion oflysophospholipid receptors reveal important roles for lysophospholipidsignaling in the development and maturation of blood vessels, formationof atherosclerotic plaques and maintenance of heart rate (Ishii, I. etal. Annu. Rev. Biochem. 73, 321-354, 2004). Angiogenesis, the formationof new capillary networks from pre-existing vasculature, is normallyinvoked in wound healing, tissue growth and myocardial angiogenesisafter ischemic injury. Peptide growth factors (e.g. vascular endothelialgrowth factor (VEGF)) and lysophospholipids control coordinatedproliferation, migration, adhesion, differentiation and assembly ofvascular endothelial cells (VECs) and surrounding vascular smooth-musclecells (VSMCs). In one aspect, dysregulation of the processes mediatingangiogenesis leads to atherosclerosis, hypertension, tumor growth,rheumatoid arthritis and diabetic retinopathy (Osborne, N. and Stainier,D. Y. Annu. Rev. Physiol. 65, 23-43, 2003).

Downstream signaling pathways evoked by lysophospholipid receptorsinclude Rac-dependent lamellipodia formation (e.g. LPA₁) andRho-dependent stress-fiber formation (e.g. LPA₁), which is important incell migration and adhesion. Dysfunction of the vascular endothelium canshift the balance from vasodilatation to vasoconstriction and lead tohypertension and vascular remodeling, which are risk factors foratherosclerosis (Maguire, J. J. et al., Trends Pharmacol. Sci. 26,448-454, 2005).

LPA contributes to both the early phase (barrier dysfunction andmonocyte adhesion of the endothelium) and the late phase (plateletactivation and intra-arterial thrombus formation) of atherosclerosis, inaddition to its overall progression. In the early phase, LPA fromnumerous sources accumulates in lesions and activates its cognate GPCRs(LPA₁ and LPA₃) expressed on platelets (Siess, W. Biochim. Biophys. Acta1582, 204-215, 2002; Rother, E. et al. Circulation 108, 741-747, 2003).This triggers platelet shape change and aggregation, leading tointra-arterial thrombus formation and, potentially, myocardialinfarction and stroke. In support of its atherogenic activity, LPA canalso be a mitogen and motogen to VSMCs and an activator of endothelialcells and macrophages. In one aspect, mammals with cardiovasculardisease benefit from LPA receptor antagonists that prevent thrombus andneointima plaque formation.

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used to treat or preventcardiovascular disease in mammal.

The term “cardiovascular disease,” as used herein refers to diseasesaffecting the heart or blood vessels or both, including but not limitedto: arrhythmia (atrial or ventricular or both); atherosclerosis and itssequelae; angina; cardiac rhythm disturbances; myocardial ischemia;myocardial infarction; cardiac or vascular aneurysm; vasculitis, stroke;peripheral obstructive arteriopathy of a limb, an organ, or a tissue;reperfusion injury following ischemia of the brain, heart or other organor tissue; endotoxic, surgical, or traumatic shock; hypertension,valvular heart disease, heart failure, abnormal blood pressure; shock;vasoconstriction (including that associated with migraines); vascularabnormality, inflammation, insufficiency limited to a single organ ortissue.

In one aspect, provided herein are methods for preventing or treatingvasoconstriction, atherosclerosis and its sequelae myocardial ischemia,myocardial infarction, aortic aneurysm, vasculitis and stroke comprisingadministering at least once to the mammal an effective amount of atleast one compound of the present invention, or a pharmaceuticallyacceptable salt thereof, or pharmaceutical composition or medicamentwhich includes a compound of the present invention, or apharmaceutically acceptable salt thereof.

In one aspect, provided herein are methods for reducing cardiacreperfusion injury following myocardial ischemia and/or endotoxic shockcomprising administering at least once to the mammal an effective amountof at least one compound of the present invention, or a pharmaceuticallyacceptable salt thereof.

In one aspect, provided herein are methods for reducing the constrictionof blood vessels in a mammal comprising administering at least once tothe mammal an effective amount of at least one compound of the presentinvention, or a pharmaceutically acceptable salt thereof.

In one aspect, provided herein are methods for lowering or preventing anincrease in blood pressure of a mammal comprising administering at leastonce to the mammal an effective amount of at least one compound of thepresent invention, or a pharmaceutically acceptable salt thereof.

Inflammation

LPA has been shown to regulate immunological responses by modulatingactivities/functions of immune cells such as T-/B-lymphocytes andmacrophages. In activated T cells, LPA activates IL-2 production/cellproliferation through LPA₁ (Gardell et al, TRENDS in Molecular MedicineVol. 12 No. 2 Feb. 2006). Expression of LPA-induced inflammatoryresponse genes is mediated by LPA₁ and LPA₃ (Biochem Biophys Res Commun.363(4):1001-8, 2007). In addition, LPA modulates the chemotaxis ofinflammatory cells (Biochem Biophys Res Commun., 1993, 15; 193(2), 497).The proliferation and cytokine-secreting activity in response to LPA ofimmune cells (J. Imuunol. 1999, 162, 2049), platelet aggregationactivity in response to LPA, acceleration of migration activity inmonocytes, activation of NF-κB in fibroblast, enhancement offibronectin-binding to the cell surface, and the like are known. Thus,LPA is associated with various inflammatory/immune diseases.

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used to treat or preventinflammation in a mammal. In one aspect, antagonists of LPA₁ and/or LPA₃find use in the treatment or prevention of inflammatory/immune disordersin a mammal. In one aspect, the antagonist of LPA₁ is a compound of thepresent invention, or a pharmaceutically acceptable salt thereof.

Examples of inflammatory/immune disorders include psoriasis, rheumatoidarthritis, vasculitis, inflammatory bowel disease, dermatitis,osteoarthritis, asthma, inflammatory muscle disease, allergic rhinitis,vaginitis, interstitial cystitis, scleroderma, eczema, allogeneic orxenogeneic transplantation (organ, bone marrow, stem cells and othercells and tissues) graft rejection, graft-versus-host disease, lupuserythematosus, inflammatory disease, type I diabetes, pulmonaryfibrosis, dermatomyositis, Sjogren's syndrome, thyroiditis (e.g.,Hashimoto's and autoimmune thyroiditis), myasthenia gravis, autoimmunehemolytic anemia, multiple sclerosis, cystic fibrosis, chronic relapsinghepatitis, primary biliary cirrhosis, allergic conjunctivitis and atopicdermatitis.

Other Diseases, Disorders or Conditions

In accordance with one aspect, are methods for treating, preventing,reversing, halting or slowing the progression of LPA-dependent orLPA-mediated diseases or conditions once it becomes clinically evident,or treating the symptoms associated with or related to LPA-dependent orLPA-mediated diseases or conditions, by administering to the mammal acompound of the present invention, or a pharmaceutically acceptable saltthereof. In certain embodiments, the subject already has a LPA-dependentor LPA-mediated disease or condition at the time of administration, oris at risk of developing a LPA-dependent or LPA-mediated disease orcondition.

In certain aspects, the activity of LPA₁ in a mammal is directly orindirectly modulated by the administration of (at least once) atherapeutically effective amount of at least one compound of the presentinvention, or a pharmaceutically acceptable salt thereof. Suchmodulation includes, but is not limited to, reducing and/or inhibitingthe activity of LPA₁. In additional aspects, the activity of LPA in amammal is directly or indirectly modulated, including reducing and/orinhibiting, by the administration of (at least once) a therapeuticallyeffective amount of at least one compound of the present invention, or apharmaceutically acceptable salt thereof. Such modulation includes, butis not limited to, reducing and/or inhibiting the amount and/or activityof a LPA receptor. In one aspect, the LPA receptor is LPA₁.

In one aspect, LPA has a contracting action on bladder smooth musclecell isolated from bladder, and promotes growth of prostate-derivedepithelial cell (J. Urology, 1999, 162, 1779-1784; J. Urology, 2000,163, 1027-1032). In another aspect, LPA contracts the urinary tract andprostate in vitro and increases intraurethral pressure in vivo (WO02/062389).

In certain aspects, are methods for preventing or treating eosinophiland/or basophil and/or dendritic cell and/or neutrophil and/or monocyteand/or T-cell recruitment comprising administering at least once to themammal an effective amount of at least one compound of the presentinvention, or a pharmaceutically acceptable salt thereof.

In certain aspects, are methods for the treatment of cystitis,including, e.g., interstitial cystitis, comprising administering atleast once to the mammal a therapeutically effective amount of at leastone compound of the present invention, or a pharmaceutically acceptablesalt thereof.

In accordance with one aspect, methods described herein include thediagnosis or determination of whether or not a patient is suffering froma LPA-dependent or LPA-mediated disease or condition by administering tothe subject a therapeutically effective amount of a compound of thepresent invention, or a pharmaceutically acceptable salt thereof, anddetermining whether or not the patient responds to the treatment.

In one aspect provided herein are compounds of the present invention,pharmaceutically acceptable salts, pharmaceutically acceptable prodrugs,and pharmaceutically acceptable solvates thereof, which are antagonistsof LPA₁, and are used to treat patients suffering from one or moreLPA-dependent or LPA-mediated conditions or diseases, including, but notlimited to, lung fibrosis, kidney fibrosis, liver fibrosis, scarring,asthma, rhinitis, chronic obstructive pulmonary disease, pulmonaryhypertension, interstitial lung fibrosis, arthritis, allergy, psoriasis,inflammatory bowel disease, adult respiratory distress syndrome,myocardial infarction, aneurysm, stroke, cancer, pain, proliferativedisorders and inflammatory conditions. In some embodiments,LPA-dependent conditions or diseases include those wherein an absoluteor relative excess of LPA is present and/or observed.

In any of the aforementioned aspects the LPA-dependent or LPA-mediateddiseases or conditions include, but are not limited to, organ fibrosis,asthma, allergic disorders, chronic obstructive pulmonary disease,pulmonary hypertension, lung or pleural fibrosis, peritoneal fibrosis,arthritis, allergy, cancer, cardiovascular disease, ult respiratorydistress syndrome, myocardial infarction, aneurysm, stroke, and cancer.

In one aspect, a compound of the present invention, or apharmaceutically acceptable salt thereof, is used to improve the cornealsensitivity decrease caused by corneal operations such as laser-assistedin situ keratomileusis (LASIK) or cataract operation, cornealsensitivity decrease caused by corneal degeneration, and dry eye symptomcaused thereby.

In one aspect, presented herein is the use of a compound of the presentinvention, or a pharmaceutically acceptable salt thereof, in thetreatment or prevention of ocular inflammation and allergicconjunctivitis, vernal keratoconjunctivitis, and papillaryconjunctivitis in a mammal comprising administering at least once to themammal an effective amount of at least one compound of the presentinvention, or a pharmaceutically acceptable salt thereof.

In one aspect, presented herein is the use of a compound of the presentinvention, or a pharmaceutically acceptable salt thereof, in thetreatment or prevention of Sjogren disease or inflammatory disease withdry eyes in a mammal comprising administering at least once to themammal an effective amount of at least one compound of the presentinvention, or a pharmaceutically acceptable salt thereof.

In one aspect, LPA and LPA receptors (e.g. LPA₁) are involved in thepathogenesis of osteoarthritis (Kotani et al, Hum. Mol. Genet., 2008,17, 1790-1797). In one aspect, presented herein is the use of a compoundof the present invention, or a pharmaceutically acceptable salt thereof,in the treatment or prevention of osteoarthritis in a mammal comprisingadministering at least once to the mammal an effective amount of atleast one compound of the present invention, or a pharmaceuticallyacceptable salt thereof.

In one aspect, LPA receptors (e.g. LPA₁, LPA₃) contribute to thepathogenesis of rheumatoid arthritis (Zhao et al, Mol. Pharmacol., 2008,73(2), 587-600). In one aspect, presented herein is the use of acompound of the present invention, or a pharmaceutically acceptable saltthereof, in the treatment or prevention of rheumatoid arthritis in amammal comprising administering at least once to the mammal an effectiveamount of at least one compound of the present invention, or apharmaceutically acceptable salt thereof.

In one aspect, LPA receptors (e.g. LPA₁) contribute to adipogenesis.(Simon et al, J. Biol. Chem., 2005, vol. 280, no. 15, p. 14656). In oneaspect, presented herein is the use of a compound of the presentinvention, or a pharmaceutically acceptable salt thereof, in thepromotion of adipose tissue formation in a mammal comprisingadministering at least once to the mammal an effective amount of atleast one compound of the present invention, or a pharmaceuticallyacceptable salt thereof.

a. In Vitro Assays

The effectiveness of compounds of the present invention as LPA1inhibitors can be determined in an LPA1 functional antagonist assay asfollows:

Chinese hamster ovary cells overexpressing human LPA1 were platedovernight (15,000 cells/well) in poly-D-lysine coated 384-wellmicroplates (Greiner bio-one, Cat #781946) in DMEM/F12 medium (Gibco,Cat #11039). Following overnight culture, cells were loaded with calciumindicator dye (AAT Bioquest Inc, Cat #34601) for 30 minutes at 37° C.The cells were then equilibrated to room temperature for 30 minutesbefore the assay. Test compounds solubilized in DMSO were transferred to384 well non-binding surface plates (Corning, Cat #3575) using theLabcyte Echo acoustic dispense and diluted with assay buffer [1×HBSSwith calcium/magnesium (Gibco Cat #14025-092), 20 mM HEPES (Gibco Cat#15630-080) and 0.1% fatty acid free BSA (Sigma Cat #A9205)] to a finalconcentration of 0.5% DMSO. Diluted compounds were added to the cells byFDSS6000 (Hamamatsu) at final concentrations ranging from 0.08 nM to 5μM. and were then incubated for 20 min at room temperature at which timeLPA (Avanti Polar Lipids Cat #857130C) was added at final concentrationsof 10 nM to stimulate the cells. The compound IC₅₀ value was defined asthe concentration of test compound which inhibited 50% of the calciumflux induced by LPA alone. IC₅₀ values were determined by fitting datato a 4-parameter logistic equation (GraphPad Prism, San Diego Calif.).

b. In Vivo AssaysLPA Challenge with Plasma Histamine Evaluation.

Compound is dosed orally p.o. 2 hours to CD-1 female mice prior to theLPA challenge. The mice are then dosed via tail vein (IV) with 0.15 mLof LPA in 0.1% BSA/PBS (2 μg/μL). Exactly 2 minutes following the LPAchallenge, the mice are euthanized by decapitation and the trunk bloodis collected. These samples are collectively centrifuged and individual75 μL samples are frozen at −20° C. until the time of the histamineassay.

The plasma histamine analysis was run by standard EIA (EnzymeImmunoassay) methods. Plasma samples were thawed and diluted 1:30 in0.1% BSA in PBS. The EIA protocol for histamine analysis as outlined bythe manufacturer was followed (Histamine EIA, Oxford BiomedicalResearch, EA #31).

The LPA used in the assay is formulated as follows: LPA(1-oleoyl-2-hydroxy-sn-glycero-3-phosphate (sodium salt), 857130P,Avanti Polar Lipids) is prepared in 0.1% BSA/PBS for total concentrationof 2 μg/μL. 13 mg of LPA is weighed and 6.5 mL 0.1% BSA added, vortexedand sonicated for ˜1 hour until a clear solution is achieved.

V. Pharmaceutical Compositions, Formulations and Combinations

In some embodiments, provided is a pharmaceutical composition comprisinga therapeutically effective amount of a compound of the presentinvention, or a pharmaceutically acceptable salt thereof. In someembodiments, the pharmaceutical composition also contains at least onepharmaceutically acceptable inactive ingredient.

In some embodiments, provided is a pharmaceutical composition comprisinga therapeutically effective amount of a compound of the presentinvention, or a pharmaceutically acceptable salt thereof, and at leastone pharmaceutically acceptable inactive ingredient. In one aspect, thepharmaceutical composition is formulated for intravenous injection,subcutaneous injection, oral administration, inhalation, nasaladministration, topical administration, ophthalmic administration orotic administration.

In some embodiments, the pharmaceutical composition is a tablet, a pill,a capsule, a liquid, an inhalant, a nasal spray solution, a suppository,a suspension, a gel, a colloid, a dispersion, a suspension, a solution,an emulsion, an ointment, a lotion, an eye drop or an ear drop.

In some embodiments, the pharmaceutical composition further comprisesone or more additional therapeutically active agents selected from:corticosteroids (e.g., dexamethasone or fluticasone), immunosuppresants(e.g., tacrolimus & pimecrolimus), analgesics, anti-cancer agent,anti-inflammatories, chemokine receptor antagonists, bronchodilators,leukotriene receptor antagonists (e.g., montelukast or zafirlukast),leukotriene formation inhibitors, monoacylglycerol kinase inhibitors,phospholipase A₁ inhibitors, phospholipase A₂ inhibitors, andlysophospholipase D (lysoPLD) inhibitors, autotaxin inhibitors,decongestants, antihistamines (e.g., loratidine), mucolytics,anticholinergics, antitussives, expectorants, anti-infectives (e.g.,fusidic acid, particularly for treatment of atopic dermatitis),anti-fungals (e.g., clotriazole, particularly for atopic dermatitis),anti-IgE antibody therapies (e.g., omalizumab), β-2 adrenergic agonists(e.g., albuterol or salmeterol), other PGD2 antagonists acting at otherreceptors such as DP antagonists, PDE4 inhibitors (e.g., cilomilast),drugs that modulate cytokine production, e.g., TACE inhibitors, drugsthat modulate activity of Th2 cytokines IL-4 & IL-5 (e.g., blockingmonoclonal antibodies & soluble receptors), PPARγ agonists (e.g.,rosiglitazone and pioglitazone), 5-lipoxygenase inhibitors (e.g.,zileuton).

In some embodiments, the pharmaceutical composition further comprisesone or more additional anti-fibrotic agents selected from pirfenidone,nintedanib, thalidomide, carlumab, FG-3019, fresolimumab, interferonalpha, lecithinized superoxide dismutase, simtuzumab, tanzisertib,tralokinumab, hu3G9, AM-152, IFN-gamma-1b, IW-001, PRM-151, PXS-25,pentoxifylline/N-acetyl-cysteine, pentoxifylline/vitamin E, salbutamolsulfate, [Sar9,Met(O2)11]-Substance P, pentoxifylline, mercaptaminebitartrate, obeticholic acid, aramchol, GFT-505, eicosapentaenoic acidethyl ester, metformin, metreleptin, muromonab-CD3, oltipraz, IMM-124-E,MK-4074, PX-102, RO-5093151. In some embodiments, provided is a methodcomprising administering a compound of the present invention, or apharmaceutically acceptable salt thereof, to a human with aLPA-dependent or LPA-mediated disease or condition. In some embodiments,the human is already being administered one or more additionaltherapeutically active agents other than a compound of the presentinvention, or a pharmaceutically acceptable salt thereof. In someembodiments, the method further comprises administering one or moreadditional therapeutically active agents other than a compound of thepresent invention, or a pharmaceutically acceptable salt thereof.

In some embodiments, the one or more additional therapeutically activeagents other than a compound of the present invention, or apharmaceutically acceptable salt thereof, are selected from:corticosteroids (e.g., dexamethasone or fluticasone), immunosuppresants(e.g., tacrolimus & pimecrolimus), analgesics, anti-cancer agent,anti-inflammatories, chemokine receptor antagonists, bronchodilators,leukotriene receptor antagonists (e.g., montelukast or zafirlukast),leukotriene formation inhibitors, monoacylglycerol kinase inhibitors,phospholipase A₁ inhibitors, phospholipase A₂ inhibitors, andlysophospholipase D (lysoPLD) inhibitors, autotaxin inhibitors,decongestants, antihistamines (e.g., loratidine), mucolytics,anticholinergics, antitussives, expectorants, anti-infectives (e.g.,fusidic acid, particularly for treatment of atopic dermatitis),anti-fungals (e.g., clotriazole, particularly for atopic dermatitis),anti-IgE antibody therapies (e.g., omalizumab), β-2 adrenergic agonists(e.g., albuterol or salmeterol), other PGD2 antagonists acting at otherreceptors such as DP antagonists, PDE4 inhibitors (e.g., cilomilast),drugs that modulate cytokine production, e.g. TACE inhibitors, drugsthat modulate activity of Th2 cytokines IL-4 & IL-5 (e.g., blockingmonoclonal antibodies & soluble receptors), PPARγ agonists (e.g.,rosiglitazone and pioglitazone), 5-lipoxygenase inhibitors (e.g.,zileuton).

In some embodiments, the one or more additional therapeutically activeagents other than a compound of the present invention, or apharmaceutically acceptable salt thereof, are other anti-fibrotic agentsselected from pirfenidone, nintedanib, thalidomide, carlumab, FG-3019,fresolimumab, interferon alpha, lecithinized superoxide dismutase,simtuzumab, tanzisertib, tralokinumab, hu3G9, AM-152, IFN-gamma-1b,IW-001, PRM-151, PXS-25, pentoxifylline/N-acetyl-cysteine,pentoxifylline/vitamin E, salbutamol sulfate, [Sar9,Met(O2)11]-SubstanceP, pentoxifylline, mercaptamine bitartrate, obeticholic acid, aramchol,GFT-505, eicosapentyl ethyl ester, metformin, metreleptin,muromonab-CD3, oltipraz, IMM-124-E, MK-4074, PX-102, RO-5093151.

In some embodiments, the one or more additional therapeutically activeagents other than a compound of the present invention, or apharmaceutically acceptable salt thereof, are selected from ACEinhibitors, ramipril, AII antagonists, irbesartan, anti-arrythmics,dronedarone, PPARα activators, PPARγ activators, pioglitazone,rosiglitazone, prostanoids, endothelin receptor antagonists, elastaseinhibitors, calcium antagonists, beta blockers, diuretics, aldosteronereceptor antagonists, eplerenone, renin inhibitors, rho kinaseinhibitors, soluble guanylate cyclase (sGC) activators, sGC sensitizers,PDE inhibitors, PDE5 inhibitors, NO donors, digitalis drugs, ACE/NEPinhibitors, statins, bile acid reuptake inhibitors, PDGF antagonists,vasopressin antagonists, aquaretics, NHE1 inhibitors, Factor Xaantagonists, Factor XIIIa antagonists, anticoagulants, anti-thrombotics,platelet inhibitors, profibroltics, thrombin-activatable fibrinolysisinhibitors (TAFI), PAI-1 inhibitors, coumarins, heparins, thromboxaneantagonists, serotonin antagonists, COX inhibitors, aspirin, therapeuticantibodies, GPIIb/IIIa antagonists, ER antagonists, SERMs, tyrosinekinase inhibitors, RAF kinase inhibitors, p38 MAPK inhibitors,pirfenidone, multi-kinase inhibitors, nintedanib, sorafenib.

In some embodiments, the one or more additional therapeutically activeagents other than a compound of the present invention, or apharmaceutically acceptable salt thereof, are selected from Gremlin-1mAb, PA1-1 mAb, Promedior (PRM-151; recombinant human Pentraxin-2);FGF21, TGFβ antagonists, αvβ6 & αvβ pan-antagonists; FAK inhibitors, TG2inhibitors, LOXL2 inhibitors, NOX4 inhibitors, MGAT2 inhibitors, GPR120agonists.

Pharmaceutical formulations described herein are administrable to asubject in a variety of ways by multiple administration routes,including but not limited to, oral, parenteral (e.g., intravenous,subcutaneous, intramuscular), intranasal, buccal, topical or transdermaladministration routes. The pharmaceutical formulations described hereininclude, but are not limited to, aqueous liquid dispersions,self-emulsifying dispersions, solid solutions, liposomal dispersions,aerosols, solid dosage forms, powders, immediate release formulations,controlled release formulations, fast melt formulations, tablets,capsules, pills, delayed release formulations, extended releaseformulations, pulsatile release formulations, multiparticulateformulations, and mixed immediate and controlled release formulations.

In some embodiments, the compound of the present invention, or apharmaceutically acceptable salt thereof, is administered orally.

In some embodiments, the compound of the present invention, or apharmaceutically acceptable salt thereof, is administered topically. Insuch embodiments, the compound of the present invention, or apharmaceutically acceptable salt thereof, is formulated into a varietyof topically administrable compositions, such as solutions, suspensions,lotions, gels, pastes, shampoos, scrubs, rubs, smears, medicated sticks,medicated bandages, balms, creams or ointments. Such pharmaceuticalcompounds can contain solubilizers, stabilizers, tonicity enhancingagents, buffers and preservatives. In one aspect, the compound of thepresent invention, or a pharmaceutically acceptable salt thereof, isadministered topically to the skin.

In another aspect, the compound of the present invention, or apharmaceutically acceptable salt thereof, is administered by inhalation.In one embodiment, the compound of the present invention, or apharmaceutically acceptable salt thereof, is administered by inhalationthat directly targets the pulmonary system.

In another aspect, the compound of the present invention, or apharmaceutically acceptable salt thereof, is formulated for intranasaladministration. Such formulations include nasal sprays, nasal mists, andthe like.

In another aspect, the compound of the present invention, or apharmaceutically acceptable salt thereof, is formulated as eye drops.

In another aspect is the use of a compound of the present invention, ora pharmaceutically acceptable salt thereof, in the manufacture of amedicament for treating a disease, disorder or conditions in which theactivity of at least one LPA receptor contributes to the pathologyand/or symptoms of the disease or condition. In one embodiment of thisaspect, the LPA is selected from LPA₁, LPA₂, LPA₃, LPA₄, LPA₅ and LPA₆.In one aspect, the LPA receptor is LPA₁. In one aspect, the disease orcondition is any of the diseases or conditions specified herein.

In any of the aforementioned aspects are further embodiments in which:(a) the effective amount of the compound of the present invention, or apharmaceutically acceptable salt thereof, is systemically administeredto the mammal; and/or (b) the effective amount of the compound isadministered orally to the mammal; and/or (c) the effective amount ofthe compound is intravenously administered to the mammal; and/or (d) theeffective amount of the compound is administered by inhalation; and/or(e) the effective amount of the compound is administered by nasaladministration; or and/or (f) the effective amount of the compound isadministered by injection to the mammal; and/or (g) the effective amountof the compound is administered topically to the mammal; and/or (h) theeffective amount of the compound is administered by ophthalmicadministration; and/or (i) the effective amount of the compound isadministered rectally to the mammal; and/or (j) the effective amount isadministered non-systemically or locally to the mammal.

In any of the aforementioned aspects are further embodiments comprisingsingle administrations of the effective amount of the compound,including further embodiments in which (i) the compound is administeredonce; (ii) the compound is administered to the mammal multiple timesover the span of one day; (iii) continually; or (iv) continuously.

In any of the aforementioned aspects are further embodiments comprisingmultiple administrations of the effective amount of the compound,including further embodiments in which (i) the compound is administeredcontinuously or intermittently: as in a a single dose; (ii) the timebetween multiple administrations is every 6 hours; (iii) the compound isadministered to the mammal every 8 hours; (iv) the compound isadministered to the mammal every 12 hours; (v) the compound isadministered to the mammal every 24 hours. In further or alternativeembodiments, the method comprises a drug holiday, wherein theadministration of the compound is temporarily suspended or the dose ofthe compound being administered is temporarily reduced; at the end ofthe drug holiday, dosing of the compound is resumed. In one embodiment,the length of the drug holiday varies from 2 days to 1 year.

Also provided is a method of inhibiting the physiological activity ofLPA in a mammal comprising administering a therapeutically effectiveamount of a compound of the present invention or a pharmaceuticallyacceptable salt thereof to the mammal in need thereof.

In one aspect, provided is a medicament for treating a LPA-dependent orLPA-mediated disease or condition in a mammal comprising atherapeutically effective amount of a compound of the present invention,or a pharmaceutically acceptable salt thereof.

In some cases disclosed herein is the use of a compound of the presentinvention, or a pharmaceutically acceptable salt thereof, in themanufacture of a medicament for the treatment of a LPA-dependent orLPA-mediated disease or condition.

In some cases disclosed herein is the use of a compound of the presentinvention, or a pharmaceutically acceptable salt thereof, in thetreatment or prevention of a LPA-dependent or LPA-mediated disease orcondition.

In one aspect, is a method for treating or preventing a LPA-dependent orLPA-mediated disease or condition in a mammal comprising administering atherapeutically effective amount of a compound of the present invention,or a pharmaceutically acceptable salt thereof.

In one aspect, LPA-dependent or LPA-mediated diseases or conditionsinclude, but are not limited to, fibrosis of organs or tissues,scarring, liver diseases, dermatological conditions, cancer,cardiovascular disease, respiratory diseases or conditions, inflammatorydisease, gastrointestinal tract disease, renal disease, urinarytract-associated disease, inflammatory disease of lower urinary tract,dysuria, frequent urination, pancreas disease, arterial obstruction,cerebral infarction, cerebral hemorrhage, pain, peripheral neuropathy,and fibromyalgia.

In one aspect, the LPA-dependent or LPA-mediated disease or condition isa respiratory disease or condition. In some embodiments, the respiratorydisease or condition is asthma, chronic obstructive pulmonary disease(COPD), pulmonary fibrosis, pulmonary arterial hypertension or acuterespiratory distress syndrome.

In some embodiments, the LPA-dependent or LPA-mediated disease orcondition is selected from idiopathic pulmonary fibrosis; other diffuseparenchymal lung diseases of different etiologies including iatrogenicdrug-induced fibrosis, occupational and/or environmental inducedfibrosis, granulomatous diseases (sarcoidosis, hypersensitivitypneumonia), collagen vascular disease, alveolar proteinosis, langerhanscell granulomatosis, lymphangioleiomyomatosis, inherited diseases(Hermansky-Pudlak Syndrome, tuberous sclerosis, neurofibromatosis,metabolic storage disorders, familial interstitial lung disease);radiation induced fibrosis; chronic obstructive pulmonary disease(COPD); scleroderma; bleomycin induced pulmonary fibrosis; chronicasthma; silicosis; asbestos induced pulmonary fibrosis; acuterespiratory distress syndrome (ARDS); kidney fibrosis;tubulointerstitium fibrosis; glomerular nephritis; focal segmentalglomerular sclerosis; IgA nephropathy; hypertension; Alport; gutfibrosis; liver fibrosis; cirrhosis; alcohol induced liver fibrosis;toxic/drug induced liver fibrosis; hemochromatosis; nonalcoholicsteatohepatitis (NASH); biliary duct injury; primary biliary cirrhosis;infection induced liver fibrosis; viral induced liver fibrosis; andautoimmune hepatitis; corneal scarring; hypertrophic scarring; Duputrendisease, keloids, cutaneous fibrosis; cutaneous scleroderma; spinal cordinjury/fibrosis; myelofibrosis; vascular restenosis; atherosclerosis;arteriosclerosis; Wegener's granulomatosis; Peyronie's disease, chroniclymphocytic leukemia, tumor metastasis, transplant organ rejection,endometriosis, neonatal respiratory distress syndrome and neuropathicpain.

In one aspect, the LPA-dependent or LPA-mediated disease or condition isdescribed herein.

In one aspect, provided is a method for the treatment or prevention oforgan fibrosis in a mammal comprising administering a therapeuticallyeffective amount of a compound of the present invention or apharmaceutically acceptable salt thereof to a mammal in need thereof.

In one aspect, the organ fibrosis comprises lung fibrosis, renalfibrosis, or hepatic fibrosis.

In one aspect, provided is a method of improving lung function in amammal comprising administering a therapeutically effective amount of acompound of the present invention, or a pharmaceutically acceptable saltthereof to the mammal in need thereof. In one aspect, the mammal hasbeen diagnosed as having lung fibrosis.

In one aspect, compounds disclosed herein are used to treat idiopathicpulmonary fibrosis (usual interstitial pneumonia) in a mammal.

In some embodiments, compounds disclosed herein are used to treatdiffuse parenchymal interstitial lung diseases in mammal: iatrogenicdrug induced, occupational/environmental (Farmer lung), granulomatousdiseases (sarcoidosis, hypersensitivity pneumonia), collagen vasculardisease (scleroderma and others), alveolar proteinosis, langerhans cellgranulonmatosis, lymphangioleiomyomatosis, Hermansky-Pudlak Syndrome,Tuberous sclerosis, neurofibromatosis, metabolic storage disorders,familial interstitial lung disease.

In some embodiments, compounds disclosed herein are used to treatpost-transplant fibrosis associated with chronic rejection in a mammal:Bronchiolitis obliterans for lung transplant.

In some embodiments, compounds disclosed herein are used to treatcutaneous fibrosis in a mammal: cutaneous scleroderma, Dupuytrendisease, keloids.

In one aspect, compounds disclosed herein are used to treat hepaticfibrosis with or without cirrhosis in a mammal: toxic/drug induced(hemochromatosis), alcoholic liver disease, viral hepatitis (hepatitis Bvirus, hepatitis C virus, HCV), nonalcoholic liver disease (NAFLD,NASH), metabolic and auto-immune disease.

In one aspect, compounds disclosed herein are used to treat renalfibrosis in a mammal: tubulointerstitium fibrosis, glomerular sclerosis.

In any of the aforementioned aspects involving the treatment of LPAdependent diseases or conditions are further embodiments comprisingadministering at least one additional agent in addition to theadministration of a compound having the structure of the presentinvention, or a pharmaceutically acceptable salt thereof. In variousembodiments, each agent is administered in any order, includingsimultaneously.

In any of the embodiments disclosed herein, the mammal is a human.

In some embodiments, compounds provided herein are administered to ahuman.

In some embodiments, compounds provided herein are orally administered.

In some embodiments, compounds provided herein are used as antagonistsof at least one LPA receptor. In some embodiments, compounds providedherein are used for inhibiting the activity of at least one LPA receptoror for the treatment of a disease or condition that would benefit frominhibition of the activity of at least one LPA receptor. In one aspect,the LPA receptor is LPA₁.

In other embodiments, compounds provided herein are used for theformulation of a medicament for the inhibition of LPA₁ activity.

Articles of manufacture, which include packaging material, a compound ofthe present invention, or a pharmaceutically acceptable salt thereof,within the packaging material, and a label that indicates that thecompound or composition, or pharmaceutically acceptable salt, tautomers,pharmaceutically acceptable N-oxide, pharmaceutically active metabolite,pharmaceutically acceptable prodrug, or pharmaceutically acceptablesolvate thereof, is used for inhibiting the activity of at least one LPAreceptor, or for the treatment, prevention or amelioration of one ormore symptoms of a disease or condition that would benefit frominhibition of the activity of at least one LPA receptor, are provided.

VI. General Synthesis Including Schemes

The compounds of the present invention can be prepared in a number ofways known to one skilled in the art of organic synthesis. The compoundsof the present invention can be synthesized using the methods describedbelow, together with synthetic methods known in the art of syntheticorganic chemistry, or by variations thereon as appreciated by thoseskilled in the art. Preferred methods include, but are not limited to,those described below. The reactions are performed in a solvent orsolvent mixture appropriate to the reagents and materials employed andsuitable for the transformations being effected. It will be understoodby those skilled in the art of organic synthesis that the functionalitypresent on the molecule should be consistent with the transformationsproposed. This will sometimes require a judgment to modify the order ofthe synthetic steps or to select one particular process scheme overanother in order to obtain a desired compound of the invention.

It will also be recognized that another major consideration in theplanning of any synthetic route in this field is the judicious choice ofthe protecting group used for protection of the reactive functionalgroups present in the compounds described in this invention. Anauthoritative account describing the many alternatives to the trainedpractitioner is Greene et al., (Protective Groups in Organic Synthesis,Fourth Edition, Wiley-Interscience (2006)).

The compounds of the present invention may be prepared by the exemplaryprocesses described in the following schemes and working examples, aswell as relevant published literature procedures that are used by oneskilled in the art. Exemplary reagents and procedures for thesereactions appear herein after and in the working examples. Protectionand deprotection in the processes below may be carried out by proceduresgenerally known in the art (see, for example, Wuts, P. G. M., Greene'sProtective Groups in Organic Synthesis, 5th Edition, Wiley (2014)).General methods of organic synthesis and functional grouptransformations are found in: Trost, B. M. et al., Eds., ComprehensiveOrganic Synthesis: Selectivity, Strategy & Efficiency in Modern OrganicChemistry, Pergamon Press, New York, N.Y. (1991); Smith, M. B. et al.,March's Advanced Organic Chemistry: Reactions, Mechanisms, andStructure. 7th Edition, Wiley, New York, N.Y. (2013); Katritzky, A. R.et al., Eds., Comprehensive Organic Functional Group Transformations II,2nd Edition, Elsevier Science Inc., Tarrytown, N.Y. (2004); Larock, R.C., Comprehensive Organic Transformations, 2^(nd) Edition, Wiley-VCH,New York, N.Y. (1999), and references therein.

Scheme 1 describes the synthesis of O-carbamoyl isoxazolearyl(heteroaryl)oxy-cyclohexyl acids 13. A 4-halo (preferably bromo)phenyl or azine (e.g. pyridine) benzoic acid 1 is converted to thecorresponding acid chloride (e.g. with SOCl₂ or oxalylchloride/catalytic DMF). This acid chloride intermediate is reacted witha substituted β-enamino-ester 2 followed by condensation withhydroxylamine to furnish the corresponding 5-halo(hetero)aryl-isoxazole4-carboxylate ester 3. Deprotection of ester 3 followed by reduction ofthe resulting acid (e.g. directly with diborane or by a 2-step procedureby reacting the acid with an alkyl chloroformate followed by reductionwith, e.g. NaBH₄, at low temperature) and protection of the resultingalcohol provides the 5-halo(hetero)aryl-isoxazole protected alcohol 4.Reaction of the haloaryl- or haloheteroaryl-isoxazoles 4 withbis(pinacolato)diboron in the presence of an appropriate palladiumcatalyst (e.g. Ishiyama, T. et al, J. Org. Chem. 1995, 60, 7508-7510)provides the corresponding pinacol boronate 5, which is then oxidizedwith hydrogen peroxide to give the corresponding phenol orhydroxyheteroarene 6 (e.g. Fukumoto, S. et al, WO 2012137982). Reactionof phenol/hydroxyheteroarene 6 with a hydroxy cyclopentyl ester 7 underMitsunobu reaction conditions (Kumara Swamy, K. C., Chem. Rev., 2009,109, 2551-2651) furnishes the corresponding isoxazole cycloalkyl etherester 8. Deprotection of the hydoxymethylisoxazole 8 provides thecyclopentyl ester isoxazole alcohol 9. Isoxazole alcohol 9 is reactedwith an activating group in the presence of base (e.g. 4-nitrophenylchloroformate) to give the 4-nitrophenyl carbonate 10, which is reactedwith an appropriate amine 11 (R³R⁴NH) to give the isoxazole O-carbamate12. Deprotection of cyclopentyl ester 12 then provides the isoxazolecarbamate cyclopentyl acids 13.

Scheme 2 describes the synthesis of N-carbamoyl isoxazole-aryloxycyclopentyl acids 19. Deprotection of the isoxazole ester 3 provides theisoxazole acid 14. Acid 14 is subjected to Curtius rearrangementconditions (e.g. Ph₂PON₃) to give the intermediate isocyanate, which isreacted in situ with an appropriate alcohol R⁴—OH to give the isoxazoleNH-carbamate 15. Reaction of the bromoaryl- orbromoheteroaryl-isoxazoles 15 with bis(pinacolato)diboron in thepresence of an appropriate palladium catalyst (e.g. Ishiyama, T. et al,J. Org. Chem. 1995, 60, 7508-7510) provides the corresponding pinacolboronate 16, which is then oxidized with hydrogen peroxide to give thecorresponding phenol or hydroxyheteroarene 17 (e.g. Fukumoto, S. et al,WO 2012137982). Reaction of phenol/hydroxyheteroarene 17 with a hydroxycyclopentyl ester 7 under Mitsunobu reaction conditions (Kumara Swamy,K. C., Chem. Rev., 2009, 109, 2551-2651) furnishes the correspondingisoxazole cyclopentyl ether ester 18. Deprotection of cyclopentyl ester18 provides the isoxazole N-carbamoyl cyclopentyl acids 19.

Scheme 3 describes the synthesis of N-carbamoyl isoxazole-aryloxycyclopentyl acids 23. Isoxazole alcohol 9 is reacted with PBr₃ (oranother mild brominating system such as CBr₄/Ph₃P) to give thecorresponding bromide 20. Displacement of isoxazole bromide 20 with NaN₃(or another azide equivalent reagent) provides the correspondingisoxazole azide, which undergoes reduction (e.g. Staudinger reductionwith Ph₃P/water) to afford isoxazole amine 21. Isoxazole amine 21 isreacted with an appropriate acylating agent (e.g. a chloroformate 22 ora 4-nitrophenylcarbonate) to provide the cyclopentyl isoxazole N—Hcarbamate ester, which is then deprotected to give the NH-carbamoylmethyl isoxazole-aryloxy cyclopentyl acids 23.

Scheme 4 describes the synthesis of carbamoyloxymethyl triazole-aryloxycyclopentyl acids 34. A dihalo (e.g. dibromo) phenyl or azine (e.g.pyridine) 24 is coupled with an appropriately protected (e.g. as atetrahydropyranyl ether) propargyl alcohol 25 under Sonogashiraconditions (e.g. Alper, P. et al, WO 2008097428) to give thecorresponding bromo-aryl or bromo-heteroaryl protected propargyl alcohol26. Thermal reaction of alkyne 3 with an alkyl azide R⁵N₃ (with orwithout an appropriate catalyst; Qian, Y. et al, J. Med. Chem., 2012,55, 7920-7939 or Boren, B. C., et al., J. Am. Chem. Soc., 2008, 130,8923-8930) provides the corresponding regioisomeric protectedhydroxylmethyl-triazoles, from which the desired triazole regioisomer 27can be isolated. Reaction of the bromoaryl- or bromoheteroaryl-triazoles5 with bis(pinacolato)diboron in the presence of an appropriatepalladium catalyst (e.g. Ishiyama, T. et al, J. Org. Chem. 1995, 60,7508-7510) provides the corresponding pinacol boronate 28, which is thenoxidized with hydrogen peroxide to give the corresponding phenol orhydroxyheteroarene 29 (e.g. Fukumoto, S. et al, WO 2012137982). Reactionof phenol/hydroxyheteroarene 7 with a 3-hydroxy cyclopentyl ester 7under Mitsunobu reaction conditions furnishes the corresponding triazolecycloalkyl ether ester 30. Deprotection of the hydoxytriazole 30provides the triazole alcohol 31, which is then reacted with4-nitrophenyl chloroformate in the presence of an appropriate base togive the corresponding triazole 4-nitrophenyl carbonate 32. The triazole4-nitrophenyl carbonate 32 is then reacted with an amine 11 in thepresence of an appropriate base to give the triazole carbamate 33, whichthen undergoes ester deprotection to give the desired carbamoyloxymethyltriazole-aryloxy cyclopentyl acids 34.

For the specific example of analogs 34, where R⁵=CH₃ (Scheme 4A),trimethylsilyl azide (Qian, Y. et al, J. Med. Chem., 2012, 55,7920-7939) is used instead of an alkyl azide for the cycloaddition tothe protected hydroxyalkyl alkyne 26. This cycloaddition can occur undereither thermal or, preferably, under transition-metal catalyzedconditions (e.g. Boren, B. C. et. al., J. Am. Chem. Soc., 2008, 130,8923-8930; Ramasamy, S., et al., Org. Process Res. Dev., 2018, 22,880-887) to provide the desired triazole regioisomer 35 as the majorproduct. The trimethylsilyl group is subsequently removed under standarddesilylation conditions (e.g. Bu₄NF, as in Qian, Y. et al, J. Med.Chem., 2012, 55, 7920-7939).

Scheme 5 describes the synthesis of N-carbamoyl triazole-aryloxycyclopentyl acids 39. Triazole alcohol 31 is oxidized to the triazoleacid 37 (e.g. directly to the acid with pyridinium dichromate or via a2-step procedure via the aldehyde [Swern oxidation or Dess-Martinperiodinane followed by NaClO₂ oxidation to the acid, e.g. Lindgren, B.O., Acta Chem. Scand. 1973, 27, 888]). Curtius rearrangement of acid 37in the presence of an alcohol R⁴—OH provides the triazole NH-carbamate38. Deprotection of the triazole NH-carbamate ester 38 provides thecyclopentyl triazole NH-carbamoyl acids 39.

Scheme 6 describes the synthesis of triazole N-carbamoyl-aryloxycyclopentyl acids 42. Triazole alcohol 31 is reacted with a brominatingagent (e.g. PBr₃ or CBr₄/Ph₃P) to give the corresponding bromide 40.Displacement of bromide 40 with NaN₃ (or other appropriate azidereagents) gives the corresponding azide, which undergoes reduction (e.g.Staudinger reduction with Ph₃P/H₂O) to afford triazole amine 41. Amine41 is then reacted with an appropriate chlorformate 22 (or thecorresponding 4-nitrophenyl carbonate) in the presence of an appropriatebase to give the corresponding NH-carbamate. Ester deprotection of thistriazole N—H carbamate ester provides the desired triazole-carbamatecyclopentyl acids 42.

Scheme 7 describes the synthesis of pyrazole carbamate cyclopentyl acids52. A pyrazole 5-carboxylic acid 43 is reduced (e.g. by a 2 step, 1-potreaction via reaction with an alkyl chloroformate followed bylow-temperature reduction with NaBH₄, or directly with diborane) to thecorresponding pyrazole alcohol, which is then protected to give pyrazoleintermediate 44. Halogenation of 44 occurs preferentially at the4-pyrazole position to give halopyrazole 45, which is then subjected toa Suzuki-Miyaura cross-coupling reaction with an appropriatelysubstituted 4-hydroxy-aryl/heteroaryl boronate 46 to provide thecorresponding 4-hydroxy-aryl(heteroaryl)-pyrazole 47. Reaction ofphenol/hydroxyheteroarene 47 with a hydroxy cyclopentyl ester 7 underMitsunobu reaction conditions (Kumara Swamy, K. C., Chem. Rev., 2009,109, 2551-2651) furnishes the corresponding pyrazole cyclopentyl ester48. Deprotection of 48 provides the pyrazole alcohol 49. Reaction ofpyrazole alcohol 49 with 4-nitro-phenyl chloroformate provides pyrazole4-nitrophenyl carbonate 50, which undergoes reaction with an appropriateamine 12 to provide the corresponding pyrazole carbamate 51.Deprotection of pyrazole carbamate cyclopentyl ester 51 provides thepyrazole carbamate cyclopentyl acids 52.

Scheme 8 describes the synthesis of pyrazole N-linked carbamatecyclohexyl acids 55. The cyclopentyl ether pyrazole-alcohol 49 isoxidized to the pyrazole carboxylic acid 53 (e.g. directly to the acidwith pyridinium dichromate or via a 2-step procedure via the aldehyde[Swern oxidation or Dess-Martin periodinane followed by NaClO₂ oxidationto the acid, e.g. Lindgren, B. O., Acta Chem. Scand. 1973, 27, 888]).Curtius rearrangement of pyrazole acid 53 in the presence of anappropriate alcohol R⁴—OH provides the pyrazole NH-carbamate 54.Deprotection of the pyrazole NH-carbamate ester 54 provides the pyrazoleNH-carbamate cyclopentyl acids 55.

Scheme 9 describes the synthesis of N-carbamoyl pyrazole-aryloxycyclopentyl acids 58. Pyrazole alcohol 52 is reacted with PBr₃ (oranother mild brominating system such as CBr₄/Ph₃P) to give thecorresponding bromide 56. Displacement of pyrazole bromide 56 with NaN₃(or other azide equivalent reagents) provides the corresponding pyrazoleazide which undergoes reduction (e.g. Staudinger reduction withPh₃P/water) to afford pyrazole amine 57. Pyrazole amine 57 is reactedwith an appropriate acylating agent (e.g. chloroformate 22 or a4-nitrophenyl carbonate) to provide the corresponding pyrazole N—Hcarbamate ester, which is deprotected to give the N-carbamoylpyrazole-aryloxy cyclopentyl acids 19.

Scheme 10 describes the synthesis of: 1) amino-azine isoxazole aryloxycyclopentyl acids 61, 2) amino-azine triazole aryloxy cyclopentyl acids63 and 3) amino-azine pyrazole aryloxy cyclopentyl acids 65, wherein oneof A¹, A² and A³ is N and the other two are CR. For instance, isoxazoleamine 21 is reacted with halo-azine 59 in the presence of an appropriatebase or via Pd catalyzed amination to give the isoxazole amino-azine 60,which is then subjected to ester deprotection to provide the desiredamino-azine isoxazole-aryloxy cyclopentyl acids 62. The correspondingtriazole amino-azine acids 63 and the pyrazole amino-azine acids 65 aresynthesized from the triazole amine 41 and the pyrazole amine 57respectively using the same general route as described for thepreparation of 61 from 21.

Scheme 10A describes an alternative synthesis of triazole amino azineacids 63. Triazole bromide 41 is reacted with an appropriate amino-azine66 in the presence of base (e.g. NaH, etc.,) to afford the correspondingtriazole amino-azine 62, which is subjected to ester deprotection togive the desired triazole amino-azine cyclopentyl acids 63. Similarly,the corresponding isoxazole bromide 20 and the pyrazole bromide 56 canbe converted to the corresponding amino-azine isoxazole acids 61 andamino-azine pyrazole acids 65 respectively by the same two-step sequenceas described for the synthesis of triazole acids 63 from triazolebromide 41.

Scheme 11 describes an alternative synthesis of triazole amino-azinecyclopentyl acids 63. The bromo-triazole 36 is deprotected to give thealcohol, which is converted to the corresponding bromide 67 (using e.g.PBr₃ or CBr₄/Ph₃P). Bromide 67 is converted to the amine 68 via a 2-stepsequence as described in Scheme 6: 1) NaN₃ displacement of the bromide,2) Staudinger reduction of the azide (Ph₃P/H₂O). Amine 68 is thensubjected to a transition-metal-catalyzed cross-coupling (e.g.palladium-mediated) with an appropriate halo-azine 59 to furnish thetriazole amino-azine 69. Conversion of the bromo-aryl/heteroaryltriazole 69 to the corresponding hydroxy-aryl/heteroaryl triazole 70 isachieved via the corresponding boronate using the 2 step sequence[B(pin)₂/Pd-catalysis followed by treatment with H₂O₂] described inScheme 4. Intermediate 70 is then subjected to a Mitsunobu reaction withhydroxy-cyclopentyl ester 7 to give triazole cyclopentyl ester 62,followed by ester deprotection to provide the desired triazoleamino-azine cyclopentyl acids 63.

Scheme 12 describes the synthesis of: 1) amino-azole isoxazolecyclopentyl acids 73, 2) amino-azole triazole cyclopentyl acids 75 and3) amino-azole pyrazole cyclopentyl acids 77, wherein A⁴, A⁵, A⁶ and A⁷are N or CR. For instance, isoxazole amine 21 is reacted with halo-azole71 in the presence of an appropriate base or under Pd-mediatedcross-coupling conditions to give the isoxazole amino-azole 72, which isthen subjected to ester deprotection to provide the desired amino-azoleisoxazole-cyclopentyl acids 73. The corresponding triazole amino-azoleacids 75 and the pyrazole amino-azole acids 77 are synthesized from thetriazole amine 41 and the pyrazole amine 57 respectively using this samegeneral route as described for the preparation of 73 from 21.

Scheme 12A describes an alternative synthesis of amino-azole triazolecyclopentyl acids 75. Triazole bromide 40 is reacted with an appropriateamino-azole 78 in the presence of base (e.g. NaH, etc.,) or underPd-mediated cross-coupling conditions to afford the correspondingtriazole amino-azole 74, which is subjected to ester deprotection togive the desired triazole amino-azole cyclopentyl acids 75. Similarly,the corresponding isoxazole bromide 20 and the pyrazole bromide 56 canbe converted to the corresponding amino-azine isoxazole acids 73 andamino-azine pyrazole acids 77 respectively by the same two-step sequenceas described for the synthesis of triazole acids 75 from triazolebromide 40.

Scheme 13 describes an alternative synthetic route to the triazoleamino-azole cyclo-pentyl acids 75. The bromo-triazole 67 is subjected toa transition-metal-catalyzed cross-coupling reaction (e.g.palladium-mediated) or a base-mediated S_(N)Ar reaction with anappropriate amino-azole 78 to furnish the triazole amino-azole 79.Conversion of the bromo-aryl/heteroaryl triazole 79 to the correspondinghydroxy-aryl/heteroaryl triazole 80 is achieved via the correspondingboronate using the 2 step sequence [B(pin)₂/Pd-catalysis followed bytreatment with H₂O₂] described in Scheme 4. Intermediate 80 is thensubjected to a Mitsunobu reaction with hydroxy-cyclopentyl ester 7 togive triazole cyclopentyl ester 74, followed by ester deprotection toprovide the desired triazole amino-azole cyclopentyl acids 73.Alternatively, the bromo-aryl/heteroaryl triazole 79 can also besynthesized by reaction of triazole amine 68 with an appropriatehalo-azole 71 in the presence of base (e.g. NaH, etc.,) or underPd-mediated cross-coupling conditions.

Scheme 14 describes an alternative synthesis of the triazole carbamatecyclopentyl acids 34. Deprotection of triazole 27 provides the triazolealcohol 81, which is treated with 4-nitro-phenyl chloroformate toprovide the intermediate triazole 4-nitrophenyl carbonate, which isreacted with an appropriate amine 11 to provide the triazole carbamate82. Reaction of the bromo-aryl/heteroaryl-triazoles 82 withbis(pinacolato)diboron in the presence of an appropriate palladiumcatalyst (e.g. Ishiyama, T. et al, J. Org. Chem. 1995, 60, 7508-7510)provides the corresponding pinacol boronate, which is then oxidized withhydrogen peroxide to give the corresponding phenol or hydroxyheteroarene83 (e.g. Fukumoto, S. et al, WO 2012137982). Mitsunobu reaction ofhydroxyheteroarene 83 with an appropriate hydroxycyclopentyl ester 7,followed by acid deprotection provides the desired triazole carbamatecyclopentyl acids 34.

Similarly, the analogous synthetic sequence (starting from thebromo-isoxazole 4) provides the isoxazole carbamate cyclopentyl acids13, via the key intermediate hydroxyaryl isoxazole carbamate 84.

The synthesis of pyrazine triazole carbamate cyclopentyl acids 91 isshown in Scheme 15. A chloro-substituted pyrazine undergoes abase-mediated S_(N)Ar reaction with an appropriate hydroxycyclopentylester 86 to give the pyrazine ether 87. Bromination of pyrazine 87((e.g. with N-bromo-succinimide, with concomitant ester deprotection)followed by reprotection of the acid, provides bromopyrazine ester 88.Sonogashira coupling reaction (e.g. Alper, P. et al, WO 2008097428) ofbromide 88 with an appropriately protected (e.g. as a tetrahydropyranylether) propargyl alcohol 25 provides the corresponding alkynyl-pyrazine89. Cycloaddition of alkyne 89 with trimethylsilyl azide (Qian, Y. etal, J. Med. Chem., 2012, 55, 7920-7939) under transition-metal catalyzedconditions (e.g. Boren, B. C. et. al., J. Am. Chem. Soc., 2008, 130,8923-8930; Ramasamy, S., et al., Org. Process Res. Dev., 2018, 22,880-887) furnishes the trimethylsilyl methyl triazole with the desiredregiochemistry. The trimethylsilyl group is subsequently removed understandard desilylation conditions (e.g. Bu₄NF, as in Qian, Y. et al, J.Med. Chem., 2012, 55, 7920-7939) to give the protected triazole alcohol90. The key pyrazine triazole alcohol intermediate 90 is carried forwardto the synthesis of pyrazine triazole carbamate cyclopentyl acids 91according to the procedures described in Scheme 4 (i.e. from 30→34).

The synthesis of pyrazine pyrazole carbamate cyclopentyl acids 95 isshown in Scheme 16. A 4-bromo-substituted pyrazole 92 is reacted withbis(pinacolato)diboron in the presence of an appropriate palladiumcatalyst (e.g. Ishiyama, T. et al, J. Org. Chem. 1995, 60, 7508-7510)provides the corresponding pinacol boronate 93. Suzuki-Miyauracross-coupling reaction of boronate 93 with bromopyrazine ester 88 (e.g.Almond-Thynne et al., Chem. Sci. 2017, 8, 40-62) provides the keypyrazine pyrazole cyclopentyl ester intermediate 94, which is thenconverted to pyrazine pyrazole carbamate cyclopentyl acids according tothe general sequence described in Scheme 4 for the correspondingtriazole cyclopentyl acids.

The synthesis of homologated cyclopentyl acids 97 is shown in Scheme 17.Cyclopentyl acid 34 is reacted with oxalyl chloride, followed bytreatment with either diazomethane or trimethylsilyl diazomethane toprovide the α-diazoketone 96. Diazoketone 96 is then subjected to theWolff rearrangement reaction (e.g., with aqueous silver benzoate) toprovide the corresponding homologated cyclopentyl acids 97.

An alternative synthetic route to the pyrazole carbamate cyclopentylacids 52 is shown in Scheme 18. A 4-bromopyrazole 5-carboxylic acidester 98 is subjected to a Suzuki-Miyaura cross-coupling reaction withan appropriately substituted 4-hydroxy-aryl/heteroaryl boronate 46 toprovide the corresponding 4-hydroxy-aryl(heteroaryl)-pyrazole 99.Reaction of phenol/hydroxyheteroarene 99 with an orthogonally protectedhydroxy cyclopentyl acid ester 7 under Mitsunobu reaction conditions(Kumara Swamy, K. C., Chem. Rev., 2009, 109, 2551-2651) furnishes thecorresponding pyrazole cyclopentyl ester 100. Selective deprotection ofthe pyrazole ester followed by reduction of the acid product (e.g. by a2 step, 1-pot reaction via reaction with an alkyl chloroformate followedby low-temperature reduction with NaBH₄, or directly with diborane) tothe corresponding pyrazole alcohol 49. Curtius rearrangement (e.g. with(PhO)₂PON₃) of an appropriate carboxylic acid R⁴CO₂H in the presence ofpyrazole alcohol 49 provides the pyrazole NH-carbamate 101.Deprotonation of NH-carbamate 101 with a suitable base (e.g. NaH orNaN(TMS)₂) followed by alkylation with an appropriate alkyl bromide oriodide (R⁸Br or R⁸I) followed by ester deprotection provides the desiredpyrazole carbamate cyclopentyl acids 52.

VII. Examples

The following Examples are offered as illustrative, as a partial scopeand particular embodiments of the invention and are not meant to belimiting of the scope of the invention. Abbreviations and chemicalsymbols have their usual and customary meanings unless otherwiseindicated. Unless otherwise indicated, the compounds described hereinhave been prepared, isolated and characterized using the schemes andother methods disclosed herein or may be prepared using the same.

As appropriate, reactions were conducted under an atmosphere of drynitrogen (or argon). For anhydrous reactions, DRISOLV® solvents from EMwere employed. For other reactions, reagent grade or HPLC grade solventswere utilized. Unless otherwise stated, all commercially obtainedreagents were used as received.

Microwave reactions were carried out using a 400 W Biotage Initiatorinstrument in microwave reaction vessels under microwave (2.5 GHz)irradiation.

HPLC/MS and preparatory/analytical HPLC methods employed incharacterization or purification of examples.

NMR (nuclear magnetic resonance) spectra were typically obtained onBruker or JEOL 400 MHz and 500 MHz instruments in the indicatedsolvents. All chemical shifts are reported in ppm from tetramethylsilanewith the solvent resonance as the internal standard. In the exampleswhere ¹H NMR spectra were collected in d₆-DMSO, a water-suppressionsequence is often utilized. This sequence effectively suppresses thewater signal and any proton peaks in the same region usually between3.30-3.65 ppm which will affect the overall proton integration.

¹HNMR spectral data are typically reported as follows: chemical shift,multiplicity (s=singlet, br s=broad singlet, d=doublet, dd=doublet ofdoublets, t=triplet, q=quartet, sep=septet, m=multiplet, app=apparent),coupling constants (Hz), and integration.

The term HPLC refers to a Shimadzu high performance liquidchromatography instrument with one of following methods:

HPLC-1: Sunfire C18 column (4.6×150 mm) 3.5 μm, gradient from 10 to 100%B:A for 12 min, then 3 min hold at 100% B.Mobile phase A: 0.05% TFA in water:CH₃CN (95:5)Mobile phase B: 0.05% TFA in CH₃CN:water (95:5)TFA Buffer pH=2.5; Flow rate: 1 mL/min; Wavelength: 254 nm, 220 nm.HPLC-2: XBridge Phenyl (4.6×150 mm) 3.5 μm, gradient from 10 to 100% B:Afor 12 min, then 3 min hold at 100% B.Mobile phase A: 0.05% TFA in water:CH₃CN (95:5)Mobile phase B: 0.05% TFA in CH₃CN:water (95:5)TFA Buffer pH=2.5; Flow rate: 1 mL/min; Wavelength: 254 nm, 220 nm.

HPLC-3: Chiralpak AD-H, 4.6×250 mm, 5 μm.

Mobile Phase: 30% EtOH-heptane (1:1)/70% CO₂

Flow rate=40 mL/min, 100 Bar, 35° C.; Wavelength: 220 nm

HPLC-4: Waters Acquity UPLC BEH C18, 2.1×50 mm, 1.7-μm particles;Mobile Phase A: 5:95 CH₃CN:water with 10 mM NH₄OAc;Mobile Phase B: 95:5 CH₃CN:water with 10 mM NH₄OAc;Temperature: 50° C.; Gradient: 0-100% B over 3 min, then a 0.75-min holdat 100% B;Flow: 1.11 mL/min; Detection: UV at 220 nm.HPLC-5: Waters Acquity UPLC BEH C18, 2.1×50 mm, 1.7-μm particles;Mobile Phase A: 5:95 CH₃CN:water with 0.1% TFA;Mobile Phase B: 95:5 CH₃CN:water with 0.1% TFA;Temperature: 50° C.; Gradient: 0-100% B over 3 min, then a 0.75-min holdat 100% B;Flow: 1.11 mL/min; Detection: UV at 220 nm.

Intermediate 1. (±)-cis-isopropyl 2-(3-hydroxycyclopentyl)acetate

Acetyl chloride (2.13 mL, 30.0 mmol) was added portionwise to i-PrOH (25mL) at 0° C. and the mixture was warmed to RT and stirred at RT for 30min, after which 2-oxa-bicyclo-[3.2.1]octan-3-one (prepared according tothe procedure described in J. Org. Chem., 1983, 48, 1643-1654; 2.91 g,23.1 mmol) was added. The reaction mixture was stirred at RT overnight,then was concentrated in vacuo, diluted with toluene, and concentratedin vacuo. The residue was chromatographed (SiO₂; continuous gradientfrom 20-50% EtOAc in hexanes) to give the title compound (2.93 g, 68%yield) as an oil. ¹H NMR (500 MHz, CDCl₃) δ 5.01 (dt, J=12.6, 6.2 Hz,1H), 4.31 (m, 1H), 2.40 (s, 1H), 2.39 (s, 1H), 2.28 (m, 1H), 2.20 (m,1H), 1.80 (m, 2H), 1.70-1.63 (m, 1H), 1.60 (m, 2H), 1.49 (m, 1H), 1.23(d, J=6.3 Hz, 6H).

Intermediate 2. (±)-trans-isopropyl 2-(3-hydroxycyclopentyl)acetate

Intermediate 2A. (±)-trans-3-(2-isopropoxy-2-oxoethyl)cyclopentyl4-nitrobenzoate

To a 0° C. solution of Intermediate 1 (1.16 g, 6.23 mmol),4-nitrobenzoic acid (1.56 g, 9.34 mmol), and Ph₃P (2.45 g, 9.34 mmol) inTHE (25 mL) was added DEAD (1.63 g, 9.34 mmol) dropwise. After stirringat 0° C. for 1 h, the reaction mixture was allowed to warm to RT andstirred overnight at RT, then was concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 5-30% EtOAc in hexanes)to give the title compound (822 mg, 39% yield). ¹H NMR (500 MHz, CDCl₃)δ 8.28 (d, J=8.5 Hz, 2H), 8.18 (d, J=8.5 Hz, 2H), 5.48 (m, 1H), 5.03 (m,1H), 2.60 (m, 1H), 2.36 (d, J=7.4 Hz, 2H), 2.28-2.06 (m, 3H), 1.86 (m,1H), 1.64 (m, 1H), 1.34 (m, 1H), 1.25 (s, 3H), 1.24 (s, 3H).

Intermediate 2

To a solution of Intermediate 2A (822 mg, 2.45 mmol) in THE (15 mL) wasadded aq. 1M LiOH (2.94 mL, 2.94 mmol). The reaction mixture was stirredat RT overnight, then was partially concentrated in vacuo, diluted withH₂O, and extracted with EtOAc (2×). The combined organic extracts werewashed with H₂O, brine, dried (MgSO₄), and concentrated in vacuo. Theresidue was chromatographed (SiO₂; continuous gradient from 25-50% EtOAcin hexanes) to give the title compound (275 mg, 60% yield) as an oil. ¹HNMR (500 MHz, CDCl₃) δ5.00 (m, 1H), 4.39 (m, 1H), 2.58 (m, 1H), 2.29 (d,J=7.4 Hz, 2H), 2.08-1.94 (m, 2H), 1.85 (m, 1H), 1.58 (m, 2H), 1.43 (m,1H), 1.33 (br d, J=3.3 Hz, 1H), 1.24 (s, 3H), 1.22 (s, 3H).

Intermediate 3. (±)-cis-isopropyl2-(3-hydroxycyclopentyl)-2-methylpropanoate and Intermediate 4.(±)-cis-isopropyl-2-(3-hydroxycyclopentyl)propanoate

These intermediates were prepared according to the procedure describedin Can. J. Chem., 1990, 68, 804-811, but as the respective isopropylesters. Intermediate 4 was prepared as a ˜2:1 mixture of diastereomersat the methyl chiral center.

Intermediate 5. (±)-Cis-methyl1-(3-hydroxycyclopentyl)cyclopropane-1-carboxylate

Intermediate 5A.(±)-4-oxaspiro[bicyclo[3.2.1]octane-2,1′-cyclopropan]-3-one

To a suspension of NaH (111 mg, 2.77 mmol, 60%) in DMSO (3 mL) was addedportionwise trimethylsulfoxonium iodide (731 mg, 3.32 mmol). The mixturewas stirred at RT for 1 h, after which a solution of4-methylene-2-oxabicyclo[3.2.1]octan-3-one (synthesized according to theprocedure described in J. Org. Chem. 1984, 49, 2079-2081, 255 mg, 1.85mmol) in DMSO (3 mL) was added. The reaction mixture was stirred at RTfor 1 h, then was quenched cautiously with satd aq. NH₄Cl and extractedwith EtOAc (2×). The combined organic extracts were washed with H₂O(4×), brine, dried (MgSO₄), and concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 20-50% EtOAc in hexanes)to give the title compound (178 mg, 63% yield) as an oil. LC-MS,[M+H]⁺=153; ¹H NMR (500 MHz, CDCl₃) δ 4.95 (m, 1H), 2.27 (br d, J=11.8Hz, 1H), 2.22-2.15 (m, 1H), 2.02-1.91 (m, 2H), 1.89-1.80 (m, 1H),1.77-1.70 (m, 2H), 1.47-1.25 (m, 2H), 0.89-0.71 (m, 2H).

Intermediate 5

Acetyl chloride (0.10 mL; 1.43 mmol) was added portionwise to MeOH (5mL) at 0° C. and the mixture was allowed to warm to RT and stirred for30 min at RT, after which Intermediate 4A (87 mg, 0.57 mmol) was added.The reaction mixture was stirred at RT overnight, then was heated at 60°for 3 h, then was cooled to RT, and concentrated in vacuo. The residuewas diluted with toluene and concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 15-50% EtOAc in hexanes)to give the title compound (18 mg, 17% yield) as an oil. ¹H NMR (500MHz, CDCl₃) δ 4.29 (m, 1H), 3.65 (s, 3H), 2.88 (br s, 1H), 2.18 (m, 1H),2.02 (m, 1H), 1.74 (m, 2H), 1.65 (m, 2H), 1.43 (m, 1H), 1.24 (m, 2H),0.80 (m, 2H).

Intermediate 6. 2,5-dibromo-3-fluoro-6-methylpyridine

Intermediate 6A. 3-fluoro-6-methylpyridin-2-amine

To a solution of 2-bromo-3-fluoro-6-methylpyridine (5.0 g, 26.3 mmol) inethylene glycol (50 ml) and aq. 28% NH₄OH (63 mL; 450 mmol) was addedCu₂O (0.19 g, 1.32 mmol), K₂CO₃ (0.73 g, 5.26 mmol), and N,N-dimethylethylenediamine (0.29 mL, 2.63 mmol). The reaction mixture waspurged with N₂ and was heated at 80° C. overnight in a sealed tube, thenwas cooled to RT and extracted with CH₂Cl₂ (3×). The combined organicextracts were dried (Na₂SO₄), and concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 0-100% EtOAc in hexanes)to give the title compound (2.81 g, 85% yield). ¹H NMR (500 MHz, CDCl₃)δ 7.11 (dd, J=10.6, 8.1 Hz, 1H), 6.47 (dd, J=8.0, 3.0 Hz, 1H), 4.55 (brs, 2H), 2.38 (s, 3H).

Intermediate 6B. 5-bromo-3-fluoro-6-methylpyridin-2-amine

To a solution of Intermediate 6A (3.91 g, 31.0 mmol) in CH₃CN (100 mL)at 0° C. and added NBS (5.52 g, 31.0 mmol) portionwise while maintainingthe reaction temperature at ≤5° C. The reaction mixture was stirred atRT for 30 min, then was concentrated in vacuo. The residue waschromatographed (SiO₂; isocratic 30% EtOAc in hexanes) to give the titlecompound (6.14 g, 97% yield). ¹H NMR (500 MHz, CDCl₃) δ 7.37 (d, J=9.6Hz, 1H), 4.59 (br s, 2H), 2.48 (d, J=1.1 Hz, 3H).

Intermediate 6

To aq. 48% HBr (23.72 mL, 210 mmol, 48%) at 0° C. was added Intermediate6B (6.14 g, 29.9 mmol) slowly portionwise. Br₂ (3.09 mL, 59.9 mmol) wasadded dropwise while maintaining the reaction temperature at ≤5° C. Thereaction mixture was stirred at 0° C. for 30 min, after which a solutionof NaNO₂ (5.17 g, 74.9 mmol) in water (10 mL) was added dropwise whilemaintaining the reaction temperature at ≤5° C. The reaction mixture wasstirred for 30 min at 0° C., then was poured into ice water, basifiedwith 50% aq. NaOH and extracted with EtOAc (2×). The combined organicextracts were washed with aq. 10% Na₂S₂O₃, brine, dried (Na₂SO₄), andconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 0-25% EtOAc in hexanes) to give the title compound (3.90g, 48% yield). ¹H NMR (500 MHz, CDCl₃) δ 7.60 (d, J=6.6 Hz, 1H), 2.64(d, J=1.4 Hz, 3H).

Intermediate 7. 4-nitrophenyl ((1-propylcyclopropyl)methyl) carbonate

7A. Tert-butyl 1-propylcyclopropane-1-carboxylate

To a solution of (i-Pr)₂NH (4.74 mL, 33.2 mmol) in THE (40 mL) at 0° C.was added n-BuLi (13.3 mL of a 2.5M solution in hexanes, 33.2 mmol)portionwise. The LDA solution was stirred for 15 min at 0° C., then waswarmed to RT, and stirred for 30 min at RT, then was cooled to −78° C.Tert-butyl cyclopropanecarboxylate (3.78 g, 26.6 mmol) was addeddropwise over 10 min. The reaction was stirred at −78° C. for 2 h, afterwhich 1-bromopropane (4.84 mL, 53.2 mmol) was added dropwise over 20min. The reaction was allowed to slowly warm to RT and stirred overnightat RT, then was quenched with satd aq. NH₄Cl and extracted with EtOAc(2×). The combined organic extracts were washed with brine, dried(MgSO₄), and concentrated in vacuo. The residue was distilled underreduced pressure (20 torr, BP=95° C.) to give the title compound (2.99g, 61% yield) as an oil. ¹H NMR (500 MHz, CDCl₃) δ 1.48 (m, 4H), 1.45(s, 9H), 1.12 (m, 2H), 0.92 (m, 3H), 0.61 (m, 2H).

Intermediate 7B. (1-propylcyclopropyl)methanol

To a solution of Intermediate 7A (250 mg, 1.36 mmol) in Et₂O (5 mL) wascautiously added LiAlH₄ (103 mg, 2.71 mmol) portionwise. The reactionmixture was stirred overnight at RT, then was sequentially treated withwater (0.1 mL), 15% aq. NaOH (0.1 mL), and water (0.3 mL). The mixturewas stirred for 1 h at RT, dried (MgSO₄) and concentrated in vacuo. Theresidue was distilled under reduced pressure to give the slightly impuretitle compound (186 mg, 120%; contains some t-BuOH) as an oil. ¹H NMR(500 MHz, CDCl₃) δ 3.44 (br s, 2H), 1.48-1.36 (m, 4H), 0.93 (t, J=7.0Hz, 3H), 0.44-0.27 (m, 4H).

Intermediate 7

To a solution of Intermediate 7B (155 mg, 1.36 mmol) in CH₂Cl₂ (10 mL)were added pyridine (0.44 mL, 5.43 mmol) and 4-nitrophenyl chloroformate(410 mg, 2.04 mmol). The reaction mixture was stirred at RT for 2 h,then was concentrated in vacuo. The residue was chromatographed (SiO₂;continuous gradient from 0-25% EtOAc in hexanes) to give the titlecompound (226 mg, 60% yield) as a white solid. ¹H NMR (500 MHz, CDCl₃) δ8.31 (d, J=9.1 Hz, 2H), 7.42 (d, J=9.1 Hz, 2H), 4.15 (s, 2H), 1.45 (m,4H), 0.96 (t, J=7.0 Hz, 3H), 0.58 (m, 2H), 0.51 (m, 2H).

The following Intermediates 8 to 11 were prepared using analogoussynthetic routes to the procedures described for the synthesis ofIntermediate 7, starting from either tert-butyl cyclopropanecarboxylateor tert-butyl cyclobutanecarboxylate.

Intermediate 8. (1-methylcyclopropyl)methyl (4-nitrophenyl) carbonate

¹H NMR (400 MHz, CDCl₃) δ 8.28 (d, J=9.2 Hz, 2H), 7.40 (d, J=9.2 Hz,2H), 4.10 (s, 2H), 1.22 (s, 3H), 0.60 (m, 2H), 0.47 (m, 2H).

Intermediate 9. (1-ethylcyclopropyl)methyl (4-nitrophenyl) carbonate

¹H NMR (400 MHz, CDCl₃) δ 8.28 (d, J=9.2 Hz, 2H), 7.39 (d, J=9.2 Hz,2H), 4.14 (s, 2H), 1.48 (q, J=7.3 Hz, 2H), 0.98 (t, J=7.4 Hz, 3H), 0.54(m, 4H).

Intermediate 10. (1-ethylcyclobutyl)methyl (4-nitrophenyl) carbonate

¹H NMR (500 MHz, CDCl₃) δ 8.31 (d, J=9.4 Hz, 2H), 7.42 (d, J=9.4 Hz,2H), 4.27 (s, 2H), 1.99-1.83 (m, 6H), 1.63 (q, J=7.4 Hz, 2H), 0.90 (t,J=7.4 Hz, 3H).

Intermediate 11. 4-nitrophenyl ((1-propylcyclobutyl)methyl) carbonate

¹H NMR (500 MHz, CDCl₃) δ 8.31 (d, J=9.4 Hz, 2H), 7.42 (d, J=9.4 Hz,2H), 4.26 (s, 2H), 1.99-1.85 (m, 6H), 1.56 (m, 2H), 1.32 (m, 2H), 0.97(t, J=7.3 Hz, 3H).

Intermediate 12. (±)-cis-benzyl 3-hydroxycyclopentane-1-carboxylate

Intermediate 12A. (±)-cis-3-((benzyloxy)carbonyl)cyclopentyl4-nitrobenzoate

To a 0° C. solution of trans-benzyl 3-hydroxycyclopentane-1-carboxylate(prepared according to the procedure described in Bioorg. Med. Chem.Lett., 2013, 23, 3833-3840; 285 mg, 1.29 mmol), 4-nitrobenzoic acid (324mg, 1.94 mmol), and Ph₃P (509 mg, 1.94 mmol) in THE (25 mL) was addedDEAD (1.17 mL, 1.94 mmol, 40%) slowly portionwise. The reaction mixturewas stirred at 0° C., then was warmed to RT and stirred at RT overnight,after which it was concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 5-30% EtOAc in hexanes)to give the title compound (430 mg, 90% yield). ¹H NMR (500 MHz, CDCl₃)δ 8.23 (d, J=8.8 Hz, 2H), 8.11 (d, J=9.1 Hz, 2H), 7.32 (m, 5H), 5.45 (m,1H), 5.12 (d, J=1.9 Hz, 2H), 2.99 (m, 1H), 2.04 (s, 6H).

Intermediate 12

To a RT solution of Intermediate 12A (328 mg, 0.89 mmol) in THE (10 mL)was added aq. 1M LiOH (0.89 mL, 0.89 mmol). The reaction mixture wasstirred at RT overnight, then was acidified with aq. 1N HCl, dilutedwith H₂O, and extracted with EtOAc (2×). The combined organic extractswere washed with H₂O, brine, dried (MgSO₄), and concentrated in vacuo.The residue was chromatographed (SiO₂; continuous gradient from 15-50%EtOAc in hexanes) to give the title compound (55 mg, 28% yield) as anoil. ¹H NMR (400 MHz, CDCl₃) δ 7.35 (m, 5H), 5.14 (s, 2H), 4.34 (m, 1H),2.93 (m, 1H), 2.13-1.94 (m, 4H), 1.79 (m, 2H).

Intermediate 13.6-(3-methyl-4-(((4-phenylpyrimidin-2-yl)amino)methyl)isoxazol-5-yl)pyridin-3-ol

Intermediate 13A.N-((5-(5-bromopyridin-2-yl)-3-methylisoxazol-4-yl)methyl)-4-phenyl-pyrimidin-2-amine

To a solution of 4-phenylpyrimidin-2-amine (116 mg, 0.678 mmol) in THE(2 mL) was added n-BuLi (0.42 mL of a 1.5 M solution in hexanes, 0.68mmol) at −78° C. The reaction mixture was allowed to warm slowly to RTand stirred for 5 min at RT. A solution of Example 29B (150 mg, 0.452mmol) in THE (1 mL) was quickly added at RT, and the mixture was stirredat RT for 48 h. The reaction mixture was diluted with H₂O (2 mL) andextracted with EtOAc (3×5 mL). The combined organic extracts were dried(MgSO₄) and concentrated in vacuo. The residue was chromatographed (12 gSiO₂, continuous gradient from 0 to 50% EtOAc in hexanes over 12 min) toprovide the title compound (172 mg, 0.407 mmol, 90% yield) as a slightlycolored solid. ¹H NMR (500 MHz, CDCl₃) δ 8.86 (d, J=2.4 Hz, 1H), 8.35(dd, J=11.3, 3.8 Hz, 1H), 7.99 (ddd, J=14.5, 8.0, 4.9 Hz, 3H), 7.83 (dd,J=20.3, 8.5 Hz, 1H), 7.48 (dd, J=5.0, 2.0 Hz, 3H), 6.98 (d, J=5.2 Hz,1H), 6.44 (t, J=6.8 Hz, 1H), 4.85 (d, J=6.6 Hz, 2H), 2.55 (s, 3H);[M+H]⁺=422.

Intermediate 13

A mixture of Pd₂(dba)₃ (20 mg, 0.022 mmol),di-tert-butyl(2′,4′,6′-triisopropyl-[1,1′-biphenyl]-2-yl)phosphine (37mg, 0.088 mmol), KOH (124 mg, 2.20 mmol), and Example 30A (155 mg, 0.367mmol) in 1,4-dioxane (2 mL) and H₂O (2 mL) was degassed (by evacuating &backfilling with Ar 3×). The reaction mixture was stirred at 85° C. for14 h, then was cooled to RT and acidified to pH 4 with aq. 1N HCl. EtOH(2 mL) was added, and the mixture was extracted with EtOAc (8×5 mL). Thecombined organic extracts were dried (MgSO₄) and concentrated in vacuo.The residual brown solid was chromatographed (12 g SiO₂, continuousgradient from 0 to 100% EtOAc in hexanes over 13 min) to provide thetitle compound (49 mg, 0.136 mmol, 37.1% yield) as a red solid. ¹H NMR(500 MHz, DMSO-d₆) δ 8.35 (d, J=2.9 Hz, 2H), 7.99 (s, 2H), 7.79 (d,J=8.6 Hz, 1H), 7.49 (t, J=7.2 Hz, 1H), 7.43 (s, 2H), 7.37 (dd, J=8.6,2.9 Hz, 1H), 7.18 (d, J=5.2 Hz, 1H), 4.82 (s, 2H), 2.33 (s, 3H);[M+H]⁺=360.3.

Intermediate 14.2-methyl-6-(3-methyl-4-(((4-(pyridin-2-yl)pyrimidin-2-yl)amino)methyl)isoxazol-5-yl)pyridin-3-ol

The title compound was synthesized following the same sequence as forthe synthesis of Example 29D from Example 29A, but using(5-(5-bromo-6-methylpyridin-2-yl)-3-methyl-isoxazol-4-yl)methanol as thestarting material instead of(5-(5-bromo-pyridin-2-yl)-3-methylisoxazol-4-yl)methanol. ¹H NMR (500MHz, DMSO-d₆) δ 8.76-8.57 (m, 1H), 8.44 (s, 1H), 8.07 (br s, 1H), 7.81(br s, 1H), 7.63 (d, J=8.4 Hz, 1H), 7.50 (t, J=5.7 Hz, 2H), 7.29 (d,J=8.4 Hz, 1H), 4.83 (s, 2H), 2.41 (s, 3H), 2.32 (s, 3H); [M+H]⁺=375.2.

Intermediate 15.2-methyl-6-(1-methyl-5-(((4-(pyridin-2-yl)pyrimidin-2-yl)amino)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-ol

The title compound was synthesized following the same sequence as forthe synthesis of Example 29D from Example 29A, but using(4-(5-bromo-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methanol30B as the starting material instead of(5-(5-bromopyridin-2-yl)-3-methylisoxazol-4-yl)methanol. ¹H NMR (500MHz, DMSO-d₆) δ 8.66 (d, J=4.8 Hz, 1H), 8.45 (s, 1H), 7.99 (br s, 1H),7.82 (s, 1H), 7.76 (d, J=8.4 Hz, 1H), 7.54-7.45 (m, 2H), 7.26 (d, J=8.4Hz, 1H), 5.10 (s, 2H), 4.13 (s, 3H), 2.40 (s, 3H); [M+H]⁺=375.1.

Intermediate 16.6-(1-methyl-5-(((4-(pyridin-2-yl)pyrimidin-2-yl)amino)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-ol

The title compound was synthesized following the same sequence as forthe synthesis of Example 29D from Example 29A, but using(4-(5-bromopyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methanol as thestarting material instead of(5-(5-bromo-pyridin-2-yl)-3-methylisoxazol-4-yl)methanol. ¹H NMR (500MHz, DMSO-d₆) δ 8.71 (d, J=4.8 Hz, 1H), 8.66 (d, J=4.6 Hz, 1H), 8.45 (d,J=5.1 Hz, 1H), 8.12 (d, J=8.0 Hz, 1H), 7.95 (t, J=7.9 Hz, 1H), 7.75 (brs, 2H), 7.52 (d, J=5.0 Hz, 1H), 7.47 (d, J=6.6 Hz, 1H), 7.40 (t, J=6.2Hz, 1H), 5.19 (s, 2H), 4.16 (s, 3H); [M+H]⁺=361.1.

Intermediate 17.6-(5-(((4-isopropylpyrimidin-2-yl)amino)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-ol

The title compound was synthesized following the same sequence as forthe synthesis of Example 29D from Example 29A, but using(4-(5-bromo-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methanol2B as the starting material instead of(5-(5-bromopyridin-2-yl)-3-methylisoxazol-4-yl)methanol. ¹H NMR (500MHz, DMSO-d₆) δ 8.19 (s, 1H), 7.75 (d, J=8.3 Hz, 1H), 7.49 (d, J=6.2 Hz,1H), 7.24 (d, J=8.3 Hz, 1H), 6.54 (d, J=5.0 Hz, 1H), 4.92 (d, J=5.9 Hz,2H), 4.14 (s, 3H), 2.69 (sep, J=7.0 Hz, 1H), 2.41 (s, 3H), 1.11 (d,J=6.9 Hz, 6H); [M+H]⁺=340.0.

Intermediate 18. 5-(2-cyclobutylethyl)-1,2,4-oxadiazol-3-amine

To a 0° C. solution of 3-cyclobutylpropanoic acid (0.29 g, 2.26 mmol) inDMF (4.5 mL) at 0° C. were successively added NaBH₃CN (145 mg, 2.26mmol), DIEA (1.98 ml, 11.3 mmol) and HATU (1.03 g, 2.72 mmol). Thereaction was allowed to warm to RT, stirred for 18 h at RT, then wasconcentrated in vacuo. The residue was suspended in EtOH (3 mL), afterwhich NH₂OH.HCl (0.24 g, 3.39 mmol) was added, followed by pyridine(0.73 mL, 9.04 mmol). The reaction was stirred at RT for 18 h, then wasconcentrated in vacuo. The residue was partitioned between CH₂Cl₂ andwater; the aqueous layer was extracted with CH₂Cl₂ (2×). The combinedorganic layers were dried (Na₂SO₄) and concentrated in vacuo. The crudeproduct was chromatographed (SiO₂, continuous gradient from 0-100% EtOAcin hexane) to afford the title compound (210 mg, 56%) as a white solid.LC-MS, [M+H]⁺=168; ¹H NMR (500 MHz, CDCl₃) δ 4.34 (br s, 2H), 2.68 (t,J=7.6 Hz, 2H), 2.34 (quin, J=7.8 Hz, 1H), 2.10 (m, 2H), 1.8 (m, 4H),1.66 (m, 2H).

Examples 1 and 2. Cis andtrans-3-(4-(3-methyl-4-((((R)-1-phenylethoxy)carbonyl)amino)isoxazol-5-yl)phenoxy)cyclopentane-1-carboxylic Acid

1A. (R)-1-phenylethyl(5-(4-hydroxyphenyl)-3-methylisoxazol-4-yl)carbamate

To a solution of (R)-1-phenylethyl(5-(4-bromophenyl)-3-methylisoxazol-4-yl) carbamate (4.3 g, 10.7 mmol;prepared according to WO2010/141761, Example 1) and B₂(OH)₂ (1.25 g,13.9 mmol) in THE (30 mL) and MeOH (12 mL) was added iPr₂NEt (4.49 mL,25.7 mmol). The mixture was degassed with N₂ andbis(di-t-Bu(4-dimethyl-aminophenyl)phosphine)Pd(II)Cl₂ (0.152 g, 0.21mmol) was added. The mixture was degassed with N₂ and was heated at 50°C. for 6 h, then was cooled to RT. The mixture was diluted with water,acidified with 1N aq. HCl and extracted with EtOAc (3×). The combinedorganic extracts were washed with water, brine, dried (MgSO₄), andconcentrated in vacuo. The residue was taken up in MeOH (100 mL) andwater (30 mL), after which aq. 30% H₂O₂ (1.07 mL, 10.5 mmol) was added.The reaction was stirred overnight, then was partially concentrated invacuo, diluted with water and extracted with EtOAc (3×). The combinedorganic extracts were washed with water, brine, dried (MgSO₄), andconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 25-75% EtOAc in hexanes) to give the title compound (1.62g, 45% yield) as a white solid. LC-MS, [M+H]⁺=339; ¹H NMR (400 MHz,CD₃OD) δ 7.61 (br d, J=8.4 Hz, 2H), 7.48-7.32 (m, 5H), 6.85 (br d, J=8.4Hz, 2H), 5.83 (m, 1H), 2.16 (s, 3H), 1.62 (br d, J=6.4 Hz, 3H).

1B. Ethyl3-(4-(3-methyl-4-((((R)-1-phenylethoxy)carbonyl)amino)isoxazol-5-yl)phenoxy)cyclopentane-1-carboxylate

To a 0° C. solution of compound 1A (100 mg, 0.296 mmol) and ethyl3-hydroxycyclopentane carboxylate (mixture of racemic cis & transisomers; 61 mg, 0.38 mmol) in THF (3 mL) were added Ph₃P (101 mg, 0.384mmol) and DEAD (0.23 mL, 0.384 mmol). The reaction was allowed to warmto RT and stirred overnight at RT, then was concentrated in vacuo. Theresidue was chromatographed (SiO₂; continuous gradient from 15-70% EtOAcin hexanes) to give the title compound (127 mg, 90% yield) as a mixtureof the cis and trans isomers. LC-MS, [M+H]⁺=479.

Examples 1 and 2

To a solution of compound 1B (127 mg, 0.265 mmol) in MeOH/THF (3 mLeach) was added aq. 2M LiOH (3 mL, 6 mmol). The reaction mixture washeated at 50° C. for 30 min, then was cooled to RT, acidified (1N aq.HCl) and extracted with EtOAc (2×). The combined organic extracts werewashed with water, brine, dried (MgSO₄), and concentrated in vacuo. Theresidue was purified by reverse phase preparative HPLC (PhenomenexLumina Axia; 30×250 mm column; continuous gradient from 50-100% MeOH/H₂Owith 0.1% TFA) to separate the cis and trans cyclopentane isomers andgave the title compounds.

Example 1 (Peak 1 to elute): (racemic cis isomer) (8 mg, 7% yield).LC-MS, [M+H]⁺=451; ¹H NMR (500 MHz, DMSO-d₆) δ 7.64 (br d, J=7.9 Hz,2H), 7.49-7.20 (m, 4H), 6.98 (br d, J=7.9 Hz, 2H), 5.74 (m, 1H), 4.89(m, 1H), 2.81 (m, 1H), 2.38 (m, 1H), 2.09 (s, 3H), 1.98-1.88 (m, 4H),1.83 (m, 1H), 1.55 (m, 2H), 1.29 (m, 1H); hLPA1 IC₅₀=104 nM.

Example 2 (Peak 2 to elute): (racemic trans isomer) (41 mg, 34% yield).LC-MS, [M+H]⁺=451; ¹H NMR (500 MHz, DMSO-d₆) δ 7.65 (br d, J=7.9 Hz,2H), 7.47-7.20 (m, 5H), 7.00 (br d, J=7.6 Hz, 2H), 5.75 (m, 1H), 4.97(m, 1H), 2.94 (m, 1H), 2.19-1.96 (m, 7H), 1.79 (m, 2H), 1.65 (m, 2H),1.28 (m, 1H); hLPA₁ IC₅₀=31 nM.

Example 3.(±)-Trans-3-(4-(4-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-3-methylisoxazol-5-yl)phenoxy)cyclopentane-1-carboxylicAcid

3A. (5-(4-bromophenyl)-3-methylisoxazol-4-yl)methanol

To a solution of 5-(4-bromophenyl)-3-methylisoxazole-4-carboxylic acid(synthesized according to the procedure described in US2011/82164 A1,2.0 g, 7.09 mmol) in THE (50 mL) was added BH₃.THF (28.4 mL of a 1Msolution in THF, 28.4 mmol) portionwise at 0° C. and the solution wasallowed to warm to RT and stirred overnight at RT. The reaction mixturewas carefully quenched with H₂O, acidified with 1N aq. HCl (50 mL),stirred for 1 h at RT, then was extracted with EtOAc (2×). The combinedorganic extracts were washed with H₂O, brine, dried (MgSO₄), andconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 35-75% EtOAc in hexanes) to give the title compound (1.65g, 87% yield) as a white solid. LC-MS, [M+H]⁺=268; ¹H NMR (CDCl₃, 400MHz) δ 7.73-7.64 (m, 4H), 4.66 (d, J=5.1 Hz, 2H), 2.42 (s, 3H).

3B.5-(4-bromophenyl)-3-methyl-4-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)isoxazole

To a solution of compound 3A (626 mg, 2.33 mmol) in CH₂Cl₂ (10 mL) wasadded 3,4-dihydro-2H-pyran (0.64 mL, 7.0 mmol) and PPTS (29 mg, 0.12mmol). After stirring overnight at RT, the mixture was quenched withsat. aq. NaHCO₃ and extracted with EtOAc (2×). The combined organicextracts were washed with H₂O, brine, dried (MgSO₄), and concentrated invacuo. The residue was chromatographed (SiO₂; continuous gradient from35-100% EtOAc/Hexanes) to give the title compound (811 mg, 99% yield) asa white solid. LC-MS, [M+H]⁺=358; ¹H NMR (500 MHz, CDCl₃) δ 7.82-7.55(m, 4H), 4.69 (m, 1H), 4.65 (m, 1H), 4.46 (m, 1H), 3.87 (m, 1H), 3.54(m, 1H), 2.37 (s, 3H), 1.86-1.55 (m, 6H).

3C.4-(3-methyl-4-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)isoxazol-5-yl)phenol

To a solution of KOH (2.70 g, 48.1 mmol) in H₂O (50 mL) was addedcompound 3B (5.65 g, 16.0 mmol) and dioxane (50 mL) and the solution wasdegassed with N₂. t-BuXphos (0.545 g, 1.28 mmol) and Pd₂(dba)₃ (0.294 g,0.321 mmol) were added and the suspension was degassed with N₂, then wasstirred at 90° C. overnight. The reaction mixture was cooled to RT,acidified with 1N aq. HCl and extracted with EtOAc (2×). The combinedorganic extracts were washed with H₂O, brine, dried (MgSO₄), andconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 25-75% EtOAc/Hexanes) to give the title compound (3.63 g,78% yield) as a white solid. LC-MS, [M+H]⁺=290; ¹H NMR (500 MHz, CDCl₃)δ 7.72 (d, J=8.8 Hz, 2H), 6.94 (d, J=8.8 Hz, 2H), 4.70 (m, 1H), 4.66 (d,J=12.4 Hz, 1H), 4.48 (d, J=12.4 Hz, 1H), 3.89 (m, 1H), 3.53 (m, 1H),2.36 (s, 3H), 1.88-1.70 (m, 2H), 1.65-1.57 (m, 4H).

3D.5-(4-((tert-butyldimethylsilyl)oxy)phenyl)-3-methyl-4-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)isoxazole

To a RT solution of compound 3C (2.0 g, 6.91 mmol) in DMF (50 ml) wasadded TBSCl (2.08 g, 13.8 mmol) and imidazole (1.88 g, 27.7 mmol). Thereaction was stirred at RT for 6 h, after which H₂O (4 mL) was added.The mixture was partially concentrated in vacuo, diluted with H₂O,acidified with 1N aq. HCl and extracted with EtOAc (2×). The combinedorganic extracts were washed with H₂O, 10% aq. LiCl, dried (MgSO₄), andconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 0-30% EtOAc/Hexanes) to give the title compound (2.55 g,91% yield) as a white solid. LC-MS, [M+H]⁺=404; ¹H NMR (500 MHz, CDCl₃)δ 7.75-7.67 (m, 2H), 6.93 (d, J=8.8 Hz, 2H), 4.71-4.68 (m, 1H), 4.66 (d,J=12.4 Hz, 1H), 4.48 (d, J=12.4 Hz, 1H), 3.88 (m, 1H), 3.53 (m, 1H),2.36 (s, 3H), 1.87-1.78 (m, 1H), 1.76-1.69 (m, 1H), 1.65-1.54 (m, 4H),1.00 (s, 9H), 0.23 (s, 6H).

3E.(5-(4-((tert-butyldimethylsilyl)oxy)phenyl)-3-methylisoxazol-4-yl)methanol

To a RT solution of compound 3D (2.45 g, 6.07 mmol) in MeOH (75 mL) wasadded PPTS (0.30 g, 1.21 mmol). The reaction was heated at 50° C. for 2h, then was cooled to RT and concentrated in vacuo. The mixture wasdiluted with H₂O and extracted with EtOAc (2×). The combined organicextracts were washed with H₂O, dried (MgSO₄), and concentrated in vacuo.The residue was chromatographed (SiO₂; continuous gradient from 25-50%EtOAc in hexanes) to give the title compound (1.18 g, 61% yield) as awhite solid. LC-MS, [M+H]⁺=320; ¹H NMR (500 MHz, CDCl₃) δ 7.68 (d, J=8.8Hz, 2H), 6.94 (d, J=8.8 Hz, 2H), 4.63 (s, 2H), 2.37 (s, 3H), 1.00 (s,9H), 0.24 (s, 6H).

3F.(5-(4-((tert-butyldimethylsilyl)oxy)phenyl)-3-methylisoxazol-4-yl)methyl(4-nitro-phenyl) carbonate

To a RT solution of compound 3E (1.8 g, 5.63 mmol) in CH₂Cl₂ (50 mL)were successively added pyridine (2.28 mL, 28.2 mmol) and 4-nitrophenylchloroformate (1.82 g, 9.01 mmol) portionwise. The reaction mixture wasstirred at RT for 1 h, then was concentrated in vacuo and the residuewas chromatographed (SiO₂; continuous gradient from 0-40% EtOAc/Hexanes)to give the slightly impure title compound (2.95 g, 108% yield) as awhite solid. LC-MS, [M+H]⁺=485. ¹H NMR (500 MHz, CDCl₃) δ 8.28 (d, J=9.1Hz, 2H), 7.68 (d, J=8.8 Hz, 2H), 7.40 (d, J=9.4 Hz, 2H), 6.98 (d, J=8.8Hz, 2H), 5.27 (s, 2H), 2.43 (s, 3H), 1.00 (s, 9H), 0.25 (s, 6H).

3G.(5-(4-((tert-butyldimethylsilyl)oxy)phenyl)-3-methylisoxazol-4-yl)methylcyclopentyl(methyl)carbamate

To a RT solution of compound 3F (1.5 g, 3.10 mmol) in THF (24 mL) wasadded iPr₂NEt (1.62 mL, 9.29 mmol) and N-methylcyclopentanamine (0.61 g,6.19 mmol). The reaction mixture was stirred overnight at RT, then wasdiluted with H₂O and extracted with EtOAc (2×). The combined organicextracts were washed with sat aq. NaHCO₃, H₂O, dried (MgSO₄), andconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 10-40% EtOAc/Hexanes) to give the title compound (1.08 g,78% yield) as a white solid. LC-MS, [M+H]⁺=445; ¹H NMR (500 MHz, CDCl₃)δ 7.67 (d, J=8.5 Hz, 2H), 6.94 (d, J=8.8 Hz, 2H), 5.08 (s, 2H),4.70-4.29 (m, 1H), 2.76 (br s, 3H), 2.38 (s, 3H), 1.82-1.49 (m, 8H),1.00 (s, 9H), 0.24 (s, 6H).

3H. (5-(4-hydroxyphenyl)-3-methylisoxazol-4-yl)methylcyclopentyl(methyl)carbamate

To a solution of compound 3G (1.08 g, 2.429 mmol) in THE (24 mL) wasadded Bu₄NF (3.04 mL of a 1M solution in THF, 3.04 mmol). The reactionmixture was stirred at RT for 1.5 h, then was concentrated in vacuo,diluted with H₂O, acidified with 1N aq. HCl and extracted with EtOAc(2×). The combined organic extracts were washed with H₂O, brine, dried(MgSO₄), and concentrated in vacuo. The residue was chromatographed(SiO₂; continuous gradient from 25-60% EtOAc/Hexanes) to give the titlecompound (619 mg, 77% yield) as a white solid. LC-MS, [M+H]⁺=331; ¹H NMR(500 MHz, CDCl₃) δ 7.63 (d, J=8.5 Hz, 2H), 6.97 (d, J=8.8 Hz, 2H), 5.12(s, 2H), 4.79-4.19 (m, 1H), 2.78 (br s., 3H), 2.39 (s, 3H), 2.00-1.33(m, 8H).

3I. (±)-trans-benzyl3-(4-(4-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-3-methyl-isoxazol-5-yl)phenoxy)cyclopentane-1-carboxylate

To a RT solution of compound 3H (60 mg, 0.182 mmol), Intermediate 12(52.0 mg, 0.236 mmol), and Ph₃P (62 mg, 0.24 mmol) in THF (3 mL) wasadded DEAD (0.14 mL, 0.236 mmol) dropwise. The reaction mixture wasstirred overnight at RT, then was concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 15-70% EtOAc in hexanes)to give the title compound (55 mg, 57% yield) as a white solid. LC-MS,[M+H]⁺=533; ¹H NMR (500 MHz, CDCl₃) δ 7.70 (d, J=8.8 Hz, 2H), 7.35 (m,5H), 6.94 (d, J=8.8 Hz, 2H), 5.14 (s, 2H), 5.07 (s, 2H), 4.92 (m, 1H),4.63-4.29 (m, 1H), 3.14 (m, 1H), 2.76 (br s, 3H), 2.38 (s, 3H), 2.21(dd, J=8.4, 4.0 Hz, 2H), 2.14 (m, 2H), 1.99-1.89 (m, 2H), 1.67 (s, 8H).

Example 3

To a RT solution of compound 31 (55 mg, 0.103 mmol) in MeOH/THF (1 mLeach) was added aq. 1M LiOH (1 mL, 1.0 mmol) and the reaction wasstirred for 1 h at RT. The mixture was diluted with H₂O, acidified with1N aq. HCl and extracted with EtOAc (2×). The combined organic extractswere washed with H₂O, brine, dried (MgSO₄), and concentrated in vacuo.The crude product was purified by reverse phase preparative HPLC:Phenomenex Lumina Axia; 30×100 mm column; 60-100% MeOH/H₂O with 0.1%TFA; 10 min gradient to give the title compound (36 mg, 80% yield) as awhite solid. LC-MS, [M+H]⁺=443; ¹H NMR (400 MHz, CD₃OD) δ 7.73 (d, J=9.0Hz, 2H), 7.05 (d, J=9.0 Hz, 2H), 5.12 (s, 2H), 5.00 (m, 1H), 4.42 (m,1H), 3.04 (m, 1H), 2.76 (s, 3H), 2.36 (s, 3H), 2.22-2.10 (m, 4H), 1.92(m, 2H), 1.76-1.47 (m, 8H); hLPA₁ IC₅₀=171 nM.

Examples 4 and 5.(±)-Trans-2-(3-((6-(5-(((butyl(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)aceticAcid

4A. (±)-trans-isopropyl2-(3-((2-methyl-6-(1-methyl-5-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-yl)oxy)cyclopentyl)acetate

To a 0° C. solution of2-methyl-6-(1-methyl-5-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-ol (synthesized according to theprocedure described for the synthesis of Example 1C in WO 2017/223016;100 mg, 0.33 mmol), Intermediate 1 (92 mg, 0.49 mmol) and Ph₃P (129 mg,0.49 mmol) in THE (3 mL) was added DEAD (215 mg, 0.49 mmol, 40% intoluene) portionwise. The solution was allowed to warm to RT and stirredat RT overnight, then was concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 35-100% EtOAc inhexanes) to give the title compound (120 mg, 77% yield) as a whitesolid. LC-MS, [M+H]⁺=473.

4B. (±)-trans-isopropyl2-(3-((6-(5-(hydroxymethyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetate

To a solution of compound 4A (1.21 g, 2.56 mmol) in MeOH (25 mL) wasadded p-TsOH (0.24 g, 1.28 mmol). The reaction was heated at 50° C. for3 h, then was cooled to RT, partially concentrated in vacuo, andbasified with satd aq. NaHCO₃. The mixture was diluted with H₂O andextracted with EtOAc (2×). The combined organic extracts were washedwith H₂O, dried (MgSO₄), and concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 35-100% EtOAc/Hexanes)to give the title compound (650 mg, 65% yield) as a white solid. LC-MS,[M+H]⁺=389; ¹H NMR (500 MHz, CDCl₃) δ 8.09 (d, J=8.8 Hz, 1H), 7.23 (d,J=8.5 Hz, 1H), 5.05 (m, 1H), 4.87 (m, 1H), 4.84 (s, 2H), 4.09 (s, 3H),2.64 (m, 1H), 2.50 (s, 3H), 2.38 (d, J=7.4 Hz, 2H), 2.25-2.09 (m, 3H),1.91 (m, 1H), 1.61 (m, 1H), 1.37 (m, 1H), 1.26 (dd, J=6.2, 2.1 Hz, 6H).

4C. (±)-trans-isopropyl2-(3-((2-methyl-6-(1-methyl-5-((((4-nitrophenoxy)carbonyl)oxy)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-yl)oxy)cyclopentyl)acetate

To a solution of compound 4B (122 mg, 0.31 mmol) in CH₂Cl₂ (5 mL) wereadded pyridine (0.10 mL, 1.26 mmol), and 4-nitrophenyl chloroformate (95mg, 0.47 mmol). The reaction mixture was stirred at RT for 2 h, then wasconcentrated in vacuo. The residue was triturated with 1:1EtOAc/hexanes; a white solid was filtered off and the filtrate wasconcentrated in vacuo and chromatographed (SiO₂; continuous gradientfrom 25-75% EtOAc in hexanes) to give the title compound (160 mg, 92%yield) as a white solid. LC-MS, [M+H]⁺=554.

Examples 4 and 5

To a solution of compound 4C (160 mg, 0.29 mmol) in THE (4 mL) wereadded iPr₂NEt (0.25 mL, 1.44 mmol) and N-methylbutan-1-amine (76 mg,0.87 mmol). The reaction mixture was stirred at RT overnight, then wasconcentrated in vacuo. The residue was dissolved in EtOAc, washed withaq. 0.5 N aq. LiOH (2×), H₂O, brine, dried (MgSO₄), and concentrated invacuo. The residue was taken up in MeOH and THE (3 mL each) and aq. 2MLiOH (3 mL, 6.0 mmol) was added. The reaction was heated at 50° C. for 1h, then was cooled to RT, diluted with H₂O, acidified with 1N aq. HCland extracted with EtOAc (2×). The combined organic extracts were washedwith H₂O, brine, dried (MgSO₄), and concentrated in vacuo to give thetitle compound (132 mg, 98% yield) as a white solid. The racemate wasseparated into the individual enantiomers using preparative chiral SFC.Column: Chiralcel OJ-H, 21×250 mm, 5 micron Mobile Phase: 10% MeOH/90%CO₂. Flow Conditions: 45 mL/min, 120 Bar, 40° C. The first elutingenantiomer was the more active enantiomer. The absolute configuration ofthe two eluted enantiomers was not determined.

Example 4 (Enantiomer 1; Peak 1 to elute): (47 mg); LCMS, [M+H]⁺=460; ¹HNMR (500 MHz, CDCl₃) δ 7.92 (br d, J=8.5 Hz, 1H), 7.11 (br d, J=8.5 Hz,1H), 5.75 (br d, J=5.5 Hz, 2H), 4.82 (m, 1H), 4.14 (s, 3H), 3.28 (m,1H), 3.13 (m, 1H), 2.98 (m, 1H), 2.92-2.79 (m, 3H), 2.64 (br s, 1H),2.45 (s, 3H), 2.24-2.08 (m, 3H), 1.93-1.84 (m, 1H), 1.68-1.47 (m, 2H),1.42-1.24 (m, 4H), 1.15 (m, 1H), 0.99-0.74 (m, 3H); hLPA1 IC₅₀=15 nM.

Example 5 (Enantiomer 2; Peak 2 to elute): (53 mg); LCMS, [M+H]⁺=460; ¹HNMR (500 MHz, CDCl₃) δ 7.92 (br d, J=8.3 Hz, 1H), 7.11 (br d, J=8.3 Hz,1H), 5.76 (br d, J=5.0 Hz, 2H), 4.82 (m, 1H), 4.14 (s, 3H), 3.29 (m,1H), 3.14 (m, 1H), 2.98 (m, 1H), 2.93-2.79 (m, 3H), 2.64 (m, 1H), 2.45(s, 3H), 2.24-2.08 (m, 3H), 1.95-1.85 (m, 1H), 1.65-1.48 (m, 2H),1.41-1.28 (m, 4H), 1.16 (m, 1H), 0.96-0.75 (m, 3H); hLPA1 IC₅₀=952 nM.

Examples 6 and 7.(±)-Trans-2-((1,3)-3-((6-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetic Acid

6A. 3-(5-bromo-6-methylpyridin-2-yl)prop-2-yn-1-ol

A solution of 3,6-dibromo-2-methylpyridine (3.0 g, 11.96 mmol), Et₃N(5.00 mL, 35.9 mmol) and prop-2-yn-1-ol (1.044 mL, 17.93 mmol) in MeCN(25 mL) was degassed with N₂ (sparged 3× with N₂). Pd(dppf)Cl₂ (0.874 g,1.196 mmol) and CuI (0.114 g, 0.598 mmol) were added and the mixture wasdegassed with N₂ again. The reaction mixture was heated at 50° C. for 3h, then was cooled to RT. The mixture was filtered through a Celiteplug, which was washed with EtOAc (3×50 mL). The combined filtrates wereconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 0% to 100% EtOAc in hexanes over 20 min) to give the titlecompound as a white solid (1.81 g, 67% yield). ¹H NMR (500 MHz, CDCl₃) δ7.77 (d, J=8.2 Hz, 1H), 7.14 (d, J=8.2 Hz, 1H), 4.51 (s, 2H), 2.66 (s,3H).

6B.(4-(5-bromo-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methanol

To a solution of (pentamethylcyclopentadienyl)Ru(II)(Ph₃P)₂Cl (440 mg,0.553 mmol) in 1,4-dioxane (100 mL) was added compound 6A (5.00 g, 15.92mmol). The mixture was degassed (evacuation/releasing into Ar; repeated3×) and TMSCH₂N₃ (4.09 g, 28.8 mmol) was added. The mixture was degassedwith Ar (evacuation/releasing into Ar; repeated 3×). The homogeneousreaction mixture was then heated at 50° C. for 20 h, then was cooled toRT and concentrated in vacuo. The residue was dissolved in THE (60 mL),after which TBAF (31.8 mL of a 1M solution in THF, 31.8 mmol) was added.The reaction mixture was stirred at RT for 30 min, then was quenchedwith satd aq. NaHCO₃ (50 mL) and extracted with EtOAc (4×50 mL). Thecombined organic extracts were washed with brine (40 mL), dried (MgSO₄)and concentrated in vacuo. The crude product was chromatographed severaltimes (330 g Gold ISCO SiO₂ column; continuous gradient from 0% to 100%EtOAc in hexanes over 35 min, then hold at 100% EtOAc for 5 min) toafford the title compound (3.0 g, 10.60 mmol, 66.5% yield) as a whitesolid.

The regiochemistry of the triazole was confirmed by 1D-NOE NMRexperiments. ¹H NMR (500 MHz, CDCl₃) δ 8.02 (d, J=8.2 Hz, 1H), 7.49 (d,J=8.2 Hz, 1H), 4.82 (d, J=6.3 Hz, 2H), 4.29 (s, 3H), 3.39 (br s, 1H),2.77 (s, 3H).

6C.(4-(5-bromo-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methyl(4-nitrophenyl) carbonate

To a solution of compound 6B and 4-nitrophenyl chloroformate (1645 mg,8.16 mmol) in THE (50 mL) was added pyridine (1.32 mL, 16.32 mmol) atRT, after which a white solid was formed. The reaction mixture wasstirred at RT for 16 h, then was concentrated in vacuo. The crudeproduct was chromatographed (330 g SiO₂; continuous gradient from 0 to100% EtOAc in CH₂Cl₂ over 15 min) to afford the title compound (2.3 g,5.13 mmol, 94% yield) as a white solid. ¹H NMR (500 MHz, CDCl₃) δ8.34-8.27 (m, 2H), 7.98 (d, J=8.4 Hz, 1H), 7.93 (d, J=8.3 Hz, 1H),7.43-7.36 (m, 2H), 6.05 (s, 2H), 4.25 (s, 3H), 2.70 (s, 3H); LCMS,[M+H]⁺=448.0.

6D.(4-(5-bromo-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methyl(cyclobutyl-methyl)(methyl)carbamate

To a solution of compound 6C (6.5 g, 14.50 mmol) in THE (100 mL) added1-cyclobutyl-N-methylmethanamine (1.817 g, 17.40 mmol) and iPr₂NEt(10.13 mL, 58.0 mmol). The reaction mixture was stirred at RT for 16 h,then was concentrated in vacuo. The residue was chromatographed (330 gSiO₂; continuous gradient from 0 to 50% EtOAc in CH₂Cl₂ over 20 min) toafford the title compound (6.0 g, 14.70 mmol, 101% yield) as a whitesolid. ¹H NMR (400 MHz, CDCl₃; mixture of rotamers) δ 7.96-7.78 (m, 2H),5.75 (s, 1H), 5.73 (s, 1H), 4.16 (s, 1.5H), 4.13 (s, 1.5H), 3.32 (d,J=7.4 Hz, 1H), 3.16 (d, J=7.3 Hz, 1H), 2.88 (s, 1.5H), 2.78 (s, 1.5H),2.68 (s, 3H), 2.64-2.50 (m, 0.5H), 2.39 (q, J=7.9 Hz, 0.5H), 2.07-1.49(m, 6H); LCMS, [M+H]⁺=409.0.

6E.(4-(5-hydroxy-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methyl(cyclobutyl-methyl)(methyl)carbamate

To a degassed (sparged with Ar 3×) solution of compound 6D (6.0 g, 14.7mmol), bis(pinacolato)diboron (5.60 g, 22.04 mmol), and KOAc (5.77 g,58.8 mmol) in 1,4-dioxane (100 mL) was added Pd(dppf)Cl₂ (1.075 g, 1.470mmol). The reaction was heated at 80° C. for 16 h under Ar, then wascooled to RT. Water (50 mL) was added and the mixture was extracted withEtOAc (3×50 mL). The combined organic extracts were washed with water(50 mL), brine (50 mL), dried (MgSO₄) and concentrated in vacuo. Thecrude pinacol boronate was used in the next step without furtherpurification.

To a 0° C. solution of the crude pinacol boronate in EtOAc (75 mL) wasadded 30% aq. H₂O₂ (6.43 mL, 73.5 mmol) portionwise. The reaction wasstirred at 0° C. for 15 min, then was warmed to RT and stirred for 1 hat RT. The reaction was cooled 0° C. and quenched with satd aq. Na₂S₂O₃(20 mL) and extracted with EtOAc (3×50 mL). The combined organicextracts were dried (MgSO₄) and concentrated in vacuo. The residue washeated at 60° C. in EtOAc (50 mL) and CH₂Cl₂ (10 mL) until all solidswere dissolved, then was cooled to RT. The solid was filtered off toafford the title compound as a slightly off-white solid (2.3 g). Thefiltrate was concentrated in vacuo, then was chromatographed (330 g ISCOGold SiO₂ column; continuous gradient from 0 to 100% EtOAc in CH₂Cl₂over 20 min, then hold at 100% EtOAc for 10 min) to afford an additional2.0 g of title compound to provide a combined total of 4.3 g of titlecompound (12.45 mmol, 85% yield) as a white solid. ¹H NMR (500 MHz,CDCl₃) δ 7.80 (d, J=8.3 Hz, 1H), 7.08 (d, J=8.3 Hz, 1H), 6.49 (s, 1H),5.81-5.68 (m, 2H), 4.17-4.11 (m, 3H), 3.32 (d, J=7.4 Hz, 1H), 3.18 (d,J=7.3 Hz, 1H), 2.88 (s, 1.5H), 2.80 (s, 1.5H), 2.56 (q, J=8.2 Hz, 0.5H),2.50 (s, 3H), 2.48-2.37 (m, 0.5H), 2.07-1.47 (m, 6H); LCMS,[M+H]⁺=346.3.

6F. (±)-Trans-isopropyl2-(3-((6-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetate

To a RT solution of compound 6E (30 mg, 0.087 mmol), Intermediate 1 (29mg, 0.156 mmol) and Ph₃P (41.0 mg, 0.16 mmol) in THE (1 mL) was addedDEAD (68 mg, 0.16 mmol, 40% in toluene) portionwise. The reactionmixture was stirred at RT for 48 h, then was concentrated in vacuo. Theresidue was chromatographed (SiO₂; continuous gradient from 25-100%EtOAc in hexanes) to give the title compound (41 mg, 92% yield) as awhite solid. LC-MS, [M+H]⁺=514.

Examples 6 and 7

To a solution of compound 6F (158 mg, 0.308 mmol) in 1:1 MeOH (1.5 mLeach) was added aq. 2M LiOH (1.5 mL, 3.0 mmol, 2M). The reaction washeated at 50° C. for 1 h, then was cooled to RT, diluted with H₂O,acidified with 1N aq. HCl to pH ˜4 and extracted with EtOAc (2×). Thecombined organic extracts were washed with H₂O, brine, dried (MgSO₄),and concentrated in vacuo. The residue was purified by reverse phaseHPLC: Phenomenex Lumina Axia; 30×100 mm column; 60-100% CH₃CN/H₂O with0.1% TFA; 10 min gradient to give the racemic title compound (115 mg,79% yield) as a white solid. This racemate (77 mg) was separated intothe two individual enantiomers using preparative chiral SFC. Column:Chiralcel OJ-H, 30×250 mm, 5 □m, Mobile Phase: 15% MeOH/85% CO₂. FlowConditions: 85 mL/min, 120 Bar, 40° C. The absolute configuration of theeluted peaks was not determined.

Example 6: (Enantiomer 1; first eluting peak from chiral SFC; 18 mg; 23%yield); LCMS, [M+H]⁺=472; ¹H NMR (500 MHz, CDCl₃) δ 7.93 (br d, J=8.3Hz, 1H), 7.11 (br d, J=8.3 Hz, 1H), 5.79-5.71 (m, 2H), 4.83 (br s, 1H),4.17-4.09 (m, 3H), 3.35-3.13 (m, 2H), 2.92-2.76 (m, 3H), 2.68-2.54 (m,2H), 2.45 (s, 3H), 2.43-2.38 (m, 1H), 2.24-2.09 (m, 3H), 2.04-1.99 (m,1H), 1.94-1.84 (m, 3H), 1.82-1.50 (m, 5H), 1.35 (br s, 1H); hLPA₁IC₅₀=11 nM.

Example 7: (Enantiomer 2; second eluting peak from chiral SFC; 19 mg;25% yield); LCMS, [M+H]⁺=472; ¹H NMR (500 MHz, CDCl₃) δ 7.92 (br d,J=7.4 Hz, 1H), 7.10 (br d, J=8.0 Hz, 1H), 5.78-5.72 (m, 2H), 4.82 (br s,1H), 4.16-4.11 (m, 3H), 3.34-3.13 (m, 2H), 2.91-2.76 (m, 3H), 2.69-2.52(m, 2H), 2.45 (s, 3H), 2.42-2.38 (m, 1H), 2.22-2.10 (m, 3H), 2.04-1.97(m, 1H), 1.94-1.83 (m, 3H), 1.80-1.51 (m, 5H), 1.34 (br s, 1H); hLPA₁IC₅₀=750 nM.

Example 8.(±)-Trans-2-(3-((6-(4-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-3-methylisoxazol-5-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)aceticAcid

8A. tert-Butyl5-(5-bromo-6-methylpyridin-2-yl)-3-methylisoxazole-4-carboxylate

To a RT solution of 5-bromo-6-methylpicolinic acid (3.0 g, 13.9 mmol) inCH₂Cl₂ (25 mL) and DMF (1 mL) under N₂ was added SOCl₂ (3.0 mL, 41.7mmol) and the reaction mixture was stirred at 55° C. for 15 h, then wascooled to RT and concentrated in vacuo. The crude acid chloride productwas dissolved in THF (10 mL) and added to a solution of tert-butyl3-(methylamino)but-2-enoate (4.67 g, 27.3 mmol) and pyridine (2.2 mL,27.3 mmol) in THE (10 mL). The reaction mixture was stirred at RT for 24h, then was concentrated in vacuo. The crude product was dissolved inEtOH (40 mL) and water (2 mL), after which NH₂OH.HCl (1.98 g, 41.7 mmol)was added. The reaction mixture was stirred at 60° C. for 15 h, then wascooled to RT and concentrated in vacuo. Water (50 mL) was added and themixture was extracted with EtOAc (2×50 mL). The combined organicextracts were washed with brine (50 mL), dried (Na₂SO₄) and concentratedin vacuo. The crude product was chromatographed (24 g SiO₂; 10% EtOAc inhexanes) to afford the title compound (2.55 g, 52%, for 3 steps) as anorange liquid. LC-MS, [M+H]⁺=355; ¹H NMR (300 MHz, CDCl₃) δ 8.16 (d,J=8.10 Hz, 1H), 7.67 (d, J=8.10 Hz, 1H), 2.73 (s, 3H), 2.48 (s, 3H),1.49 (s, 9H).

8B. 5-(5-Bromo-6-methylpyridin-2-yl)-3-methylisoxazole-4-carboxylic Acid

To a stirred solution of compound 8A (2.50 g, 7.08 mmol) in CH₂Cl₂ (4mL) was added TFA (3.82 mL, 49.5 mmol) and the reaction mixture wasstirred at RT for 15 h, then was concentrated in vacuo to afford thetitle compound (1.75 g, 83%) as a yellow solid, which was used in thenext reaction without further purification. LC-MS, [M+H]⁺=297; ¹H NMR(400 MHz, CDCl₃) δ 8.21 (d, J=8.80 Hz, 1H), 7.92 (d, J=8.80 Hz, 1H),2.79 (s, 3H), 2.63 (s, 3H).

8C. (5-(5-Bromo-6-methylpyridin-2-yl)-3-methylisoxazol-4-yl)methanol

To a 0° C. solution of compound 8B (1.50 g, 5.05 mmol) in THE (80 mL)was added ethyl chloroformate (1.64 g, 12 mmol), TEA (1.41 mL, 10.1mmol). The reaction was stirred at RT for 16 h, then was filteredthrough Celite and the filtrate was concentrated in vacuo. The residuewas dissolved in EtOH (15 mL) and to this 0° C. solution was added NaBH₄(0.573 g, 15.2 mmol). The reaction mixture was stirred at RT for 1 h,then was quenched with 0° C. aq. 1.5 N HCl (50 mL) and extracted withCH₂Cl₂ (2×50 mL). The combined organic extracts were washed with brine(50 mL), dried (Na₂SO₄), filtered and concentrated in vacuo. The crudeproduct was chromatographed (12 g SiO₂; 20% EtOAc in n-hexanes) toafford the title compound (1.22 g, 85%) as a white solid. LC-MS,[M+H]⁺=283; ¹H NMR (300 MHz, CDCl₃) δ 8.00 (d, J=8.40 Hz, 1H), 7.70 (d,J=8.40 Hz, 1H), 4.62 (s, 2H), 2.75 (s, 3H), 2.36 (s, 3H).

8D.5-(5-Bromo-6-methylpyridin-2-yl)-3-methyl-4-(((tetrahydro-2H-pyran-2yl)oxy)methyl) isoxazole

To a RT solution of compound 8C (1.20 g, 4.24 mmol) in 1,4-dioxane (15mL) was added 3,4-dihydro-2H-pyran (0.46 g, 5.51 mmol) and PPTS (0.533g, 2.12 mmol). The reaction mixture was stirred at RT for 15 h, then wasdiluted with water (20 mL) and extracted with EtOAc (2×30 mL). Thecombined organic extracts were washed with brine (30 mL), dried(Na₂SO₄), and concentrated in vacuo. The crude product waschromatographed (24 g SiO₂; 20% EtOAc in n-hexanes) to afford the titlecompound (1.30 g, 84%) as a colorless liquid. LC-MS, [M+H]⁺=367; ¹H NMR(400 MHz, CDCl₃) δ 7.91 (d, J=8.40 Hz, 1H), 7.59 (d, J=8.40 Hz, 1H),5.02 (ABq, J=11.60 Hz, 2H), 4.75 (t, J=3.60 Hz, 1H), 4.00-4.10 (m, 1H),3.80-3.95 (m, 1H), 2.70 (s, 3H), 2.41 (s, 3H), 1.40-1.90 (m, 6H).

8E.3-Methyl-5-(6-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)-4(((tetrahydro-2H-pyran-2-yl)oxy)methyl)isoxazole

To a degassed solution of compound 8D (1.30 g, 3.54 mmol),bis(pinacolato) diboron (1.80 g, 7.1 mmol) and KOAc (0.695 g, 7.08 mmol)in dioxane (40 mL) was added1,1′-bis(diphenyl-phosphino)ferrocene-Pd(II)Cl₂—CH₂Cl₂ adduct (0.578 g,0.708 mmol) and the reaction mixture was heated at 90° C. for 8 h, thenwas cooled to RT. The mixture was filtered through Celite, which waswashed with EtOAc (50 mL). The combined filtrates were concentrated invacuo to give the title compound product (1.25 g, 85%) as a colorlessoil. This crude product was used in the next step without furtherpurification. LC-MS, [M+H]⁺=415.

8F.2-Methyl-6-(3-methyl-4-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)isoxazol-5-yl)pyridine-3-ol

To a mixture of compound 8E (1.25 g, 3.02 mmol) in THE (15 mL) and water(2 mL) was added NaBO₃.H₂O (1.21 g, 12.1 mmol) and the reaction mixturewas stirred at 55° C. for 90 min, then was cooled to RT. The mixture wasdiluted with EtOAc (80 mL), washed with water (2×50 mL), dried (Na₂SO₄)and concentrated in vacuo. The crude product was chromatographed (24 gSiO₂, 25% EtOAc in hexanes) to afford the title compound (0.78 g, 85%)as colorless oil. LC-MS, [M+H]⁺=303; ¹H NMR (300 MHz, DMSO-d₆) δ 10.44(s, 1H), 7.59 (d, J=8.40 Hz, 1H), 7.25 (d, J=8.40 Hz, 1H), 5.03 (ABq,J=12.40 Hz, 2H), 4.70 (br. s., 1H), 3.75-3.90 (m, 1H), 3.40-3.50 (m,1H), 2.39 (s, 3H), 2.29 (s, 3H), 1.35-1.80 (m, 6H).

8G.5-(5-((tert-butyldimethylsilyl)oxy)-6-methylpyridin-2-yl)-3-methyl-4-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)isoxazole

To a solution of compound 8F in DMF (15 ml) was added TBSCl (0.990 g,6.57 mmol) and imidazole (0.895 g, 13.1 mmol). The reaction was stirredat RT for 3 days, after which H₂O (4 mL) was added. The mixture waspartially concentrated in vacuo, diluted with H₂O, then was carefullyneutralized with 1N aq. HCl and extracted with EtOAc (2×). The combinedorganic extracts were washed with H₂O, 10% aq. LiCl, dried (MgSO₄), andconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 10-30% EtOAc in hexanes) to give the title compound (1.21g, 88% yield) as a white solid. LC-MS, [M+H]⁺=419.

8H.(5-(5-((tert-butyldimethylsilyl)oxy)-6-methylpyridin-2-yl)-3-methylisoxazol-4-yl)methanol

To a solution of compound 8G (1.21 g, 2.89 mmol) in MeOH (15 mL) wasadded PPTS (73 mg, 0.29 mmol). The reaction was heated at 50° C. for 2h, then was cooled to RT. Solid NaHCO₃ was added, and the mixture wasconcentrated in vacuo. The mixture was diluted with H₂O, neutralizedwith 1N aq. HCl, and extracted with EtOAc (2×). The combined organicextracts were washed with H₂O, dried (MgSO₄), and concentrated in vacuo.The residue was chromatographed (SiO₂; continuous gradient from 25-50%EtOAc in hexanes) to give the title compound (426 mg, 44% yield) as awhite solid. LC-MS, [M+H]⁺=335. ¹H NMR (500 MHz, CDCl₃) δ 7.74 (d, J=8.3Hz, 1H), 7.19 (d, J=8.5 Hz, 1H), 6.60 (t, J=6.7 Hz, 1H), 4.60 (d, J=6.9Hz, 2H), 2.52 (s, 3H), 2.33 (s, 3H), 1.04 (s, 9H), 0.28 (s, 6H).

81.(5-(5-((tert-butyldimethylsilyl)oxy)-6-methylpyridin-2-yl)-3-methylisoxazol-4-yl)methyl(4-nitrophenyl) carbonate

To a RT solution of compound 8H (426 mg, 1.27 mmol) in CH₂Cl₂ (10 mL)were successively added pyridine (0.51 mL, 6.37 mmol) and 4-nitrophenylchloroformate (513 mg, 2.55 mmol) portionwise. The reaction mixture wasstirred at RT for 1 h, then was concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 0-70% EtOAc in hexanes)to give the slightly impure title compound (666 mg, 105% yield). LC-MS,[M+H]⁺=500.

8J.(5-(5-hydroxy-6-methylpyridin-2-yl)-3-methylisoxazol-4-yl)methylcyclopentyl(methyl)carbamate

To a RT solution of compound 81 (666 mg, 1.333 mmol) in THE (10 mL) wasadded iPr₂NEt (1.16 ml, 6.67 mmol) and N-methylcyclopentanamine (397 mg,4.00 mmol). The reaction mixture was stirred overnight at RT, then wasconcentrated in vacuo. The residue was dissolved in THE (10 mL), and 1MTBAF in THE (1.33 mL, 1.33 mmol) was added. The reaction was stirred atRT for 30 min, then was diluted with H₂O, neutralized with 1N aq. HCl,and extracted with EtOAc (2×). The combined organic extracts were washedwith H₂O, brine, dried (MgSO₄), and concentrated in vacuo. The residuewas chromatographed (SiO₂; continuous gradient from 20-75% EtOAc inhexanes) to give the title compound (330 mg, 72% yield) as a whitesolid. LC-MS, [M+H]⁺=346; ¹H NMR (500 MHz, CDCl₃) δ 7.46 (d, J=8.5 Hz,1H), 6.97 (d, J=8.5 Hz, 1H), 5.59 (s, 2H), 4.49 (m, 1H), 2.77 (s, 3H),2.46 (s, 3H), 2.39 (s, 3H), 1.77 (br s, 2H), 1.66 (m, 2H), 1.58-1.46 (m,4H).

8K. (±)-Trans-isopropyl2-(3-((6-(4-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-3-methylisoxazol-5-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetate

To a RT solution of compound 8J (20 mg, 0.058 mmol), Intermediate 1 (19mg, 0.10 mmol) and Ph₃P (27 mg, 0.104 mmol) in THE (1 mL) was added DEAD(45 mg, 0.104 mmol, 40% in toluene). The reaction mixture was stirred atRT for 48 h, then was concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 15-60% EtOAc in hexanes)to give the slightly impure title compound (31 mg, 104% yield) as awhite solid. LC-MS, [M+H]⁺=514.

Example 8

To a solution of compound 8K (30 mg, 0.058 mmol) in MeOH/THF (0.75 mLeach) was added aq. 2M LiOH (0.75 mL, 1.5 mmol). The reaction was heatedat 50° C. for 1 h, then was cooled to RT, diluted with H₂O, acidifiedwith 1N aq. HCl to pH ˜4 and extracted with EtOAc (2×). The combinedorganic extracts were washed with H₂O, brine, dried (MgSO₄), andconcentrated in vacuo. The residue was purified by preparative LC/MSusing the following conditions: Column: XBridge C18, 19×200 mm, 5 μmparticles; Mobile Phase A: 5:95 MeCN:H₂O with 10 mM aq. NH₄OAc; MobilePhase B: 95:5 MeCN:H₂O with 10 mM aq. NH₄OAc; Gradient: 20-60% B:A over19 min, then a 5 min hold at 100% B; Flow: 20 mL/min. to give the titlecompound (16 mg, 58% yield) as a white solid. LCMS, (M+H)⁺=472; ¹H NMR(500 MHz, DMSO-d₆) δ 7.69 (d, J=8.5 Hz, 1H), 7.42 (d, J=8.6 Hz, 1H),5.31 (s, 2H), 4.93 (br s, 1H), 2.62 (br s, 3H), 2.43-2.37 (m, 1H), 2.35(s, 3H), 2.28 (s, 4H), 2.20-2.10 (m, 1H), 1.99-1.91 (m, 2H), 1.73-1.64(m, 1H), 1.62-1.30 (m, 9H), 1.29-1.19 (m, 1H); hLPA₁ IC₅₀=13 nM.

Example 9.(±)-Trans-2-(3-((2-methyl-6-(1-methyl-5-(((((1-propylcyclopropyl)methoxy)carbonyl)amino)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-yl)oxy)cyclopentyl)aceticAcid

9A. (±)-trans-isopropyl2-(3-((6-(5-(bromomethyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetate

To a 0° C. solution of compound 4B (250 mg, 0.644 mmol) in DME (6 mL)was added PBr₃ (0.121 mL, 1.29 mmol) and the reaction was allowed towarm to RT and stirred at RT overnight. The reaction was cooled to 0°C., neutralized with sat. aq. NaHCO₃, diluted with H₂O and extractedwith EtOAc (2×). The combined organic extracts were dried (MgSO₄), andconcentrated in vacuo to give the crude title compound (273 mg, 94%yield) as a white solid. LC-MS, [M+H]⁺=451.

9B. (±)-trans-isopropyl2-(3-((6-(5-(aminomethyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetate

To a solution of compound 9A (273 mg, 0.60 mmol) in DMF (3 mL) was addedNaN₃ (79 mg, 1.21 mmol). The reaction was stirred at 80° C. for 2 h,then was cooled to RT, diluted with H₂O and extracted with EtOAc (2×).The combined organic extracts were washed with aq. 10% LiOH, dried(MgSO₄), and concentrated in vacuo. The residue was dissolved in THE (3mL) and H₂O (1 mL), after which Ph₃P (175 mg, 0.665 mmol) was added. Thereaction mixture was stirred at RT overnight, then was diluted with H₂Oand extracted with EtOAc (2×). The combined organic extracts were washedwith brine, dried (MgSO₄), and concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 0% to 15% MeOH inCH₂Cl₂) to give the title compound (164 mg, 70% yield). LCMS,[M+H]⁺=388; ¹H NMR (500 MHz, CDCl₃) δ 7.98 (d, J=8.5 Hz, 1H), 7.15 (d,J=8.5 Hz, 1H), 5.04 (m, 1H), 4.85 (m, 1H), 4.19 (s, 2H), 4.11 (s, 3H),2.65 (m, 1H), 2.49 (s, 3H), 2.37 (d, J=7.4 Hz, 2H), 2.23-2.06 (m, 3H),1.92 (m, 1H), 1.58 (m, 1H), 1.35 (m, 1H), 1.26 (dd, J=6.2, 1.8 Hz, 6H).

Example 9

To a solution of compound 9B (20 mg, 0.052 mmol) in THE (1 mL) was addediPr₂NEt (0.018 mL, 0.103 mmol) and Intermediate 7 (16 mg, 0.057 mmol).The reaction mixture was stirred at RT for 2 h, then was diluted withH₂O and extracted with EtOAc (2×). The combined organic extracts werewashed with aq. 0.5 N LiOH (2×), H₂O, brine, dried (MgSO₄), andconcentrated in vacuo. The crude carbamate ester product was dissolvedin MeOH and THE (0.5 mL each) and aq. 2M LiOH (0.5 mL, 1.0 mmol) wasadded. The reaction was heated at 50° C. for 1 h, then was cooled to RT,diluted with H₂O, acidified with 1N aq. HCl to pH ˜6 and extracted withEtOAc (2×). The combined organic extracts were washed with H₂O, brine,dried (MgSO₄), and concentrated in vacuo. The crude material waspurified by preparative LC/MS using the following conditions: Column:XBridge C18, 19×200 mm, 5 μm particles; Mobile Phase A: 5:95 MeCN:H₂Owith 10 mM aq. NH₄OAc; Mobile Phase B: 95:5 MeCN:H₂O with 10 mM aq.NH₄OAc; Gradient: 20-60% B:A over 20 min, then a 5 min hold at 100% B;Flow: 20 mL/min to give the title compound (11 mg, 44% yield). LCMS,[M+H]⁺=486; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (br d, J=8.5 Hz, 1H), 7.61(br s, 1H), 7.40 (br d, J=8.6 Hz, 1H), 4.91 (br s, 1H), 4.72 (br s, 2H),4.04 (s, 3H), 3.81-3.71 (m, 2H), 2.43 (m, 1H), 2.38 (s, 3H), 2.28 (m,1H), 2.16 (m, 1H), 1.97 (m, 2H), 1.70 (m, 1H), 1.54 (m, 1H), 1.32-1.14(m, 5H), 0.99 (br d, J=6.2 Hz, 1H), 0.78 (m, 3H), 0.38-0.15 (m, 4H);hLPA₁ IC₅₀=111 nM.

Example 10.(±)-Trans-2-(3-((2-methyl-6-(1-methyl-5-(((methyl(1-propylcyclopropyl)carbamoyl)oxy)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-yl)oxy)cyclopentyl)aceticAcid

10A. 1-propylcyclopropane-1-carboxylic Acid

To a 0° C. solution of conc. HCl (7.00 mL, 85 mmol) in 1,4-dioxane (20mL) was added Intermediate 7A (500 mg, 2.71 mmol). The solution wasallowed to warm to RT and stirred overnight at RT, then was diluted withH₂O and extracted with EtOAc (3×). The combined organic extracts weredried (Na₂SO₄), and concentrated in vacuo to give the title compound(339 mg, 97%) as an oil. ¹H NMR (500 MHz, CDCl₃) δ 1.52 (m, 4H), 1.29(m, 2H), 0.92 (m, 3H), 0.78 (m, 2H).

10B. (±)-Trans-isopropyl2-(3-((2-methyl-6-(1-methyl-5-((((1-propylcyclopropyl)carbamoyl)oxy)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-yl)oxy)cyclopentyl)acetate

To a solution of compound 10A (35 mg, 0.27 mmol) and Example 4B (35 mg,0.09 mmol) in toluene (1.5 mL) were added Et₃N (0.038 mL, 0.27 mmol) and(PhO)₂PON₃ (0.039 mL, 0.18 mmol). The reaction mixture was heated at 80°C. overnight, then was cooled to RT and concentrated in vacuo. Theresidue was chromatographed (SiO₂; continuous gradient from 40-75% EtOAcin hexanes) to give the title compound (18 mg, 39% yield) as a whitesolid. LC-MS, [M+H]⁺=514; ¹H NMR (500 MHz, CDCl₃) δ 7.93 (d, J=8.5 Hz,1H), 7.12 (d, J=8.5 Hz, 1H), 5.75 (s, 2H), 5.15 (br s, 1H), 5.04 (m,1H), 4.83 (m, 1H), 4.12 (s, 3H), 2.63 (m, 1H), 2.47 (s, 3H), 2.36 (d,J=7.4 Hz, 2H), 2.23-2.06 (m, 3H), 1.90 (m, 1H), 1.63-1.52 (m, 3H), 1.34(m, 2H), 1.26 (dd, J=6.3, 1.7 Hz, 6H), 0.93 (m, 3H), 0.77 (m, 2H), 0.66(m, 2H).

Example 10

To a solution of compound 10B in DMF (1 mL) was added 60% NaH in oil (4mg, 0.105 mmol). The reaction was stirred at RT for 5 min, then Mel (70μL of a 2M solution in t-BuOMe, 0.140 mmol,) was added. The reactionmixture was stirred at RT for 1 h, then was quenched with H₂O andextracted with EtOAc (2×). The combined organic extracts were washedwith aq 10% LiCl, dried (MgSO₄), and concentrated in vacuo. The cruderesidue was dissolved in MeOH and THE (0.75 mL each) and aq. 2M LiOH(0.75 mL, 1.5 mmol) was added. The reaction was heated at 50° C. for 1h, then was cooled to RT, diluted with H₂O, acidified with 1N aq. HCl topH ˜4 and extracted with EtOAc (2×). The combined organic extracts werewashed with H₂O, brine, dried (MgSO₄), and concentrated in vacuo. Thecrude material was purified by preparative LC/MS using the followingconditions: Column: XBridge C18, 19×200 mm, 5 μm particles; Mobile PhaseA: 5:95 MeCN:H₂O with 10 mM aq. NH₄OAc; Mobile Phase B: 95:5 MeCN:H₂Owith 10 mM aq. NH₄OAc; Gradient: 15-55% B:A over 20 min, then a 4 minhold at 100% B; Flow: 20 mL/min. to give the title compound (16 mg,88%). LCMS, (M+H)⁺=486; ¹H NMR (500 MHz, DMSO-d₆) δ 7.83 (d, J=8.5 Hz,1H), 7.40 (br d, J=8.6 Hz, 1H), 5.61 (br s, 2H), 4.91 (br s, 1H),4.14-4.06 (m, 3H), 2.78-2.69 (m, 3H), 2.43 (m, 1H), 2.35 (s, 3H), 2.30(br d, J=7.2 Hz, 2H), 2.15 (m, 1H), 1.97 (m, 2H), 1.76-1.41 (m, 4H),1.30-1.04 (m, 4H), 0.84 (m, 1H), 0.67-0.57 (m, 4H), 0.46 (m, 1H); hLPA₁IC₅₀=372 nM.

Examples 11 and 12 were synthesized according to the methods describedfor the synthesis of Example 3 using Intermediate 12.

Ex # Structure & Name Analytical Data Method 11

LCMS, [M − H]⁺ = 443.1; ¹H NMR (500 MHz, DMSO-d₆) δ 7.72-7.56 (m, 2H),7.06-6.86 (m, 2H), 5.45-5.17 (m, 2H), 4.93- 4.78 (m, 1H), 4.13-4.07 (m,3H), 2.85-2.74 (m, 1H), 2.73-2.58 (m, 4H), 2.42-2.25 (m, 1H), 2.17- 1.77(m, 6H), 1.70-1.36 (m, 8H); hLPA₁ IC₅₀ = 386 nM. Example 3 (Inter-mediate 12 and Example 4G from WO20172 23016)Cis-3-(4-(5-(((cyclopentyl(methyl) carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)phenoxy)cyclo- pentane-1-carboxylic acid 12

LCMS, [M − H]⁺ = 445.1; ¹H NMR (500 MHz, DMSO-d₆) δ 7.75-7.55 (m, 2H),7.11-6.80 (m, 2H), 5.42-5.14 (m, 2H), 4.97- 4.76 (m, 1H), 4.21-3.97 (m,3H), 3.31-3.04 (m, 2H), 2.85-2.71 (m, 4H), 2.43-2.31 (m, 1H), 2.05- 1.75(m, 5H), 1.58-1.14 (m, 4H), 0.96-0.64 (m, 6H); hLPA₁ IC₅₀ = 448 nM.Example 3 and Example 11 Cis-3-(4-(5-(((isopentyl(methyl)carbamoyl)oxy)methyl)-1-methyl-1H- 1,2,3-triazol-4-yl)phenoxy)cyclo-pentane-1-carboxylic acid

Example 13.(±)-Trans-3-((5-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylicAcid

13A. (±)-Trans-tert-butyl 3-hydroxycyclopentanecarboxylate

A mixture of tert-butyl cyclopent-3-enecarboxylate (5.0 g, 29.7 mmol)and Rh(I)(Ph₃P)Cl (0.412 g, 0.446 mmol) in THE (50 mL) was cooled to−13° C. (internal temperature) and catecholborane (10.2 mL of a 50%solution in toluene; 38.6 mmol) was added portionwise over 10 min,during which a slight exotherm occurred. The reaction temperature wasmaintained at ≤−11° C. and the reaction was stirred for 1 h at −10° C.,then was slowly quenched with solid Na₂HPO₄ (2.24 g, 15.8 mmol) whilethe temperature was kept at ≤0° C. Aq. 35% H₂O₂ (20.8 mL, 238 mmol) wasadded slowly dropwise to the reaction mixture while maintaining thereaction temperature at ≤0° C. The reaction was stirred for 1 h at 0°C., then was allowed to warm to RT and stirred at RT for 18 h. Water (20mL) was added to the mixture, which was extracted with EtOAc (10 mL×2).The combined organic extracts were washed with aq. 0.1N NaOH (3×10 mL;to remove catechol), brine, dried (MgSO₄) and concentrated in vacuo. Thecrude oil was chromatographed (80 g SiO₂; continuous gradient from 0% to100% EtOAc in hexane over 30 min) to give the title compound (4.50 g,24.2 mmol, 81% yield) as a clear oil. ¹H NMR (400 MHz, CDCl₃) δ4.36-4.26 (m, 1H), 2.96-2.79 (m, 2H), 2.05-1.62 (m, 5H), 1.61-1.48 (m,1H), 1.39-1.30 (m, 9H)

13B. (±)-Trans-tert-butyl3-((3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate

To a solution of compound 13A (100 mg, 0.537 mmol) in THE (1 mL) wasadded 1 M KOtBu in THE (0.644 mL, 0.644 mmol) at 0° C. under N₂. Afterstirring for 10 min, 2-chloro-3-methylpyrazine (0.065 mL, 0.622 mmol)was added. The reaction mixture was slowly warmed to RT and stirred for1 h at RT, then was quenched with water (2 mL) and 1 N aq. HCl (3 mL)and extracted with EtOAc (5 mL). The organic layer was washed withbrine, dried (MgSO₄) and concentrated in vacuo. The crude oil waspurified by preparative HPLC (Phenomenex Luna 5u C18 30×250 mm column;detection at 220 nm; flow rate=30 mL/min; continuous gradient from 30% Bto 100% B over 10 min+2 min hold time at 100% B, where A=90:10:0.1H₂O:MeCN:TFA and B=90:10:0.1 MeCN:H₂O:TFA) to give the title compound(87 mg, 0.313 mmol, 58.2% yield) as a clear oil. ¹H NMR (400 MHz, CDCl₃)δ 8.26 (d, J=2.9 Hz, 1H), 8.09 (d, J=2.4 Hz, 1H), 5.63-5.53 (m, 1H),3.06-2.90 (m, 1H), 2.57 (s, 3H), 2.32-2.05 (m, 4H), 2.02-1.80 (m, 2H),1.47 (s, 9H).

13C.(±)-Trans-3-((5-bromo-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylicAcid

To a 0° C. solution of compound 13B (58 mg, 0.208 mmol) in DMF (1 mL)was added N-bromosuccinimide (74.2 mg, 0.417 mmol). The reaction waswarmed to 90° C., stirred for 3 days at 90° C., then was cooled to RTand concentrated in vacuo. The residue was purified by preparative HPLC(Sunfire C18 30×100 mm column; detection at 220 nm; flow rate=40 mL/min;continuous gradient from 10% B to 100% B over 10 min+2 min hold time at100% B, where A=90:10:0.1 H₂O:MeCN:TFA and B=90:10:0.1 MeCN:H₂O:TFA) togive the title compound (3 mg, 9.96 μmol, 4.78% yield) as a light brownoil. ¹H NMR (500 MHz, CDCl₃) δ 8.03 (s, 1H), 5.49 (tt, J=5.3, 2.6 Hz,1H), 3.21-3.09 (m, 1H), 2.45 (s, 3H), 2.36-2.15 (m, 4H), 2.06-1.87 (m,2H).

13D. (±)-Trans-ethyl3-((5-bromo-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate

A mixture of compound 13C (4 mg, 0.013 mmol) and1-chloro-N,N,2-trimethylpropenylamine (3.5 μL, 0.027 mmol) in CH₂Cl₂(0.5 mL) was stirred at RT for 30 min, after which EtOH (0.1 mL) wasadded. The reaction was stirred for 30 min, then was concentrated invacuo. The crude oil was chromatographed (4 g SiO₂; continuous gradientfrom 0% to 50% EtOAc in hexane over 10 min) to give the title compound(4 mg, 0.012 mmol, 91% yield) as a clear oil. ¹H NMR (500 MHz, CDCl₃) δ8.02 (d, J=0.8 Hz, 1H), 5.47 (tt, J=5.4, 2.5 Hz, 1H), 4.18 (q, J=7.2 Hz,2H), 3.07 (quin, J=8.0 Hz, 1H), 2.44 (s, 3H), 2.28-2.14 (m, 4H),2.01-1.86 (m, 2H), 1.29 (t, J=7.2 Hz, 3H).

13E. (±)-Trans-ethyl3-((5-(3-hydroxyprop-1-yn-1-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate

To a degassed solution of compound 13D (0.12 g, 0.365 mmol), propargylalcohol (0.05 mL, 0.729 mmol), Et₃N (0.10 mL, 0.729 mmol) and CuI (3.5mg, 0.018 mmol) in DMF (5 mL) was added (Ph₃P)₄Pd(0); 20 mg, 0.018mmol). The reaction was stirred at 50° C. for 16 h, then was cooled toRT and partitioned between EtOAc (3 mL) and water (5 mL). The aqueousphase was extracted with EtOAc (3×3 mL); the combined organic extractswere dried (MgSO₄) and concentrated in vacuo. The crude oil waschromatographed (12 g SiO₂; continuous gradient from 0% to 50% EtOAc inhexane over 10 min) to give the title compound (0.10 g, 0.329 mmol, 90%yield) as a yellowish oil. ¹H NMR (400 MHz, CDCl₃) δ 8.05 (d, J=0.4 Hz,1H), 5.51 (tt, J=5.3, 2.6 Hz, 1H), 4.52 (s, 2H), 4.16 (q, J=7.3 Hz, 2H),3.06 (quin, J=8.1 Hz, 1H), 2.42 (d, J=0.4 Hz, 3H), 2.28-2.06 (m, 4H),1.99-1.80 (m, 2H), 1.27 (t, J=7.2 Hz, 3H); [M+H]⁺=305.1.

13F. (±)-Trans-ethyl3-((5-(5-(hydroxymethyl)-1-methyl-1H-1,2,3-triazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate

To a degassed solution of compound 13E (100 mg, 0.329 mmol) in1,4-dioxane (5 mL), TMSCH₂N₃ (0.049 mL, 0.329 mmol), CuI (3.13 mg, 0.016mmol), and Ru(II)(Ph₃P)₂(pentamethylcyclopentadienyl)Cl (13.1 mg, 0.016mmol) were added. The reaction mixture was stirred at 50° C. for 2 h,then was cooled to RT. The cloudy reaction mixture was filtered and thefiltrate was concentrated in vacuo to give a crude brown oil. Theresidue was dissolved in THE (5 mL); 1.0 M Bu₄NF in THE (0.657 mL, 0.657mmol) was added, and the mixture was stirred at RT for 60 min, then wasquenched with satd aq. NaHCO₃ (2 mL). The mixture was extracted withEtOAc (4×2 mL). The combined organic extracts were washed with brine (5mL), dried (MgSO₄) and concentrated in vacuo. The crude oil waschromatographed (12 g SiO₂; continuous gradient from 0% to 50% EtOAc inhexane over 10 min) to give the title compound (70 mg, 0.194 mmol, 58.9%yield) as a light yellowish oil. ¹H NMR (500 MHz, CDCl₃) δ 8.88 (s, 1H),6.11 (br. s., 1H), 5.61 (tt, J=5.2, 2.5 Hz, 1H), 4.82 (s, 2H), 4.18 (q,J=7.2 Hz, 2H), 4.10 (s, 3H), 3.09 (quin, J=8.2 Hz, 1H), 2.50 (s, 3H),2.32-2.10 (m, 4H), 2.01-1.85 (m, 2H), 1.29 (t, J=7.2 Hz, 3H);[M+H]⁺=362.0.

13G. (±)-Trans-ethyl3-((3-methyl-5-(1-methyl-5-((((4-nitrophenoxy)carbonyl)oxy)methyl)-1H-1,2,3-triazol-4-yl)pyrazin-2-yl)oxy)cyclopentanecarboxylate

A solution of 4-nitrophenyl chloroformate (47 mg, 0.232 mmol) in CH₂Cl₂(0.5 mL) was added dropwise to a solution of compound 13F (70 mg, 0.194mmol) and pyridine (0.08 mL, 0.968 mmol) in CH₂Cl₂ (1 mL) over 1 h. Thereaction was stirred at RT for 1 h, then was concentrated in vacuo. Thecrude oil was chromatographed (4 g SiO₂; continuous gradient from 0% to50% EtOAc in hexane over 10 min) to give the title compound (80 mg,0.152 mmol, 78% yield) as a light yellowish oil. [M+H]⁺=527.0 Example 13To a solution of compound 13G (20 mg, 0.038 mmol) in CH₂Cl₂ (1 mL) wereadded 1-cyclobutyl-N-methylmethanamine (4.6 mg, 0.046 mmol) and iPr₂NEt(0.02 mL, 0.114 mmol). The reaction mixture was stirred at RT for 2 h,then was concentrated in vacuo. To the crude oily product was added 1.0M aq. NaOH (0.370 mL, 0.370 mmol) in THF (0.5 mL)/MeOH (0.1 mL), and thereaction was stirred at RT for 3 h, then was concentrated in vacuo. Theresidue was purified by preparative HPLC (Sunfire C18 30×100 mm column;detection at 220 nm; flow rate=40 mL/min; continuous gradient from 10% Bto 100% B over 10 min+2 min hold time at 100% B, where A=90:10:0.1H₂O:MeCN:TFA and B=90:10:0.1 MeCN:H₂O:TFA) to give Example 1 compound(17 mg, 0.029 mmol, 79% yield) as a clear oil. ¹H NMR (400 MHz, CDCl₃) δ8.70 (s, 1H), 5.73-5.53 (m, 3H), 4.16 (br. s., 3H), 3.32 (d, J=7.0 Hz,1H), 3.25-3.05 (m, 2H), 2.93-2.73 (m, 3H), 2.65-1.43 (m, 16H); MS (ESI)m/z: 459.1 (M+H)⁺; hLPA₁ IC₅₀=618 nM.

Example 14.(±)-trans-3-((5-(5-((((cyclo-pentylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylic Acid

Example 14 was synthesized according to the methods described and theintermediates used for the synthesis of Example 13. [M+H]⁺=473.1; ¹H NMR(400 MHz, CDCl₃) δ 8.66 (s, 1H), 5.69-5.56 (m, 3H), 4.18 (s, 3H),3.28-3.04 (m, 3H), 2.94-2.80 (m, 3H), 2.46 (s, 3H), 2.32-2.17 (m, 4H),2.09-1.89 (m, 3H), 1.76-1.39 (m, 6H), 1.27-0.95 (m, 2H); hLPA₁ IC₅₀=184nM.

Example 15.(±)-Trans-3-((5-(5-((((benzyloxy)carbonyl)amino)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylicAcid

15A. (±)-Trans-ethyl3-((5-(5-((((benzyloxy)carbonyl)amino)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate

A solution of (±)-trans-ethyl3-((5-(5-(hydroxymethyl)-1-methyl-1H-1,2,3-triazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate(20 mg, 0.055 mmol), benzyl N-[(tert-butoxy)carbonyl]carbamate (21 mg,0.083 mmol), n-Bu₃P (0.020 mL, 0.083 mmol), and1,1′-(azodicarbonyl)dipiperidine (21 mg, 0.083 mmol) in THE (1 mL) wasstirred at 50° C. for 3 h, then was cooled to RT. TFA (0.5 mL) wasadded, and the reaction was stirred at RT for 1 h, then was concentratedin vacuo. The crude oil was partitioned between EtOAc (2 mL) and water(2 mL). The organic layer was washed with water, dried (MgSO₄), andconcentrated in vacuo. The crude oil was chromatographed (4 g SiO₂;continuous gradient from 0% to 50% EtOAc in hexane over 10 min) to givethe title compound (18 mg, 0.036 mmol, 65.8% yield) as a clear oil. MS(ESI) m/z: 495.1 (M+H)⁺.

Example 15

A mixture of compound 15A (18 mg, 0.036 mmol) and 1.0 M aq. NaOH (0.37mL, 0.37 mmol) in THE (0.5 mL)/MeOH (0.1 mL) was stirred at RT for 3 h,then was concentrated in vacuo. The residue was purified by preparativeHPLC (Sunfire C18 30×100 mm column; detection at 220 nm; flow rate=40mL/min; continuous gradient from 10% B to 100% B over 10 min+2 min holdtime at 100% B, where A=90:10:0.1 H₂O:MeCN:TFA and B=90:10:0.1MeCN:H₂O:TFA) to give the title compound (9 mg, 0.015 mmol, 42.2% yield)as a clear oil. [M−H]⁺=467.1; ¹H NMR (400 MHz, CDCl₃) δ 8.80 (s, 1H),7.40-7.28 (m, 5H), 6.53-6.35 (m, 1H), 5.64-5.56 (m, 1H), 5.08 (s, 2H),4.63 (br s, 2H), 4.22 (s, 3H), 3.21-3.08 (m, 1H), 2.46 (s, 3H),2.30-2.17 (m, 4H), 2.06-1.91 (m, 2H); hLPA₁ IC₅₀=714 nM.

Example 16.(±)-Trans-3-((5-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-pyrazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylicAcid (Racemate)

16A. (4-bromo-1-methyl-1H-pyrazol-5-yl)methanol

A mixture of 4-bromo-1-methyl-1H-pyrazole-5-carboxylic acid (4.9 g,23.90 mmol) and BH₃□THF complex (36 ml, 35.9 mmol) in THE (50 ml) wasstirred at RT for 1 h, then at 50° C. for 3 days and cooled to RT. Thereaction was cautiously quenched with with 1N aq. HCl (10 mL). Themixture was partitioned between CH₂Cl₂ (20 mL) and water (20 mL); theaqueous phase was extracted with EtOAc (3×10 mL), and the combinedorganic layers were dried (MgSO₄) and filtered through a pad of SiO₂ togive the crude title compound (4.30 g, 22.5 mmol, 94% yield) as a whitesolid. ¹H NMR (500 MHz, CDCl₃) δ 7.43 (s, 1H), 4.73 (br s, 2H), 3.98 (s,3H), 3.53-3.36 (m, 1H).

16B.4-bromo-1-methyl-5-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)-1H-pyrazole

A mixture of compound 16A (4.20 g, 22.0 mmol), dihydropyran (4.0 mL,44.0 mmol), and PPTS (0.55 g, 2.20 mmol) in CH₂Cl₂ (20 mL) was stirredat RT for 18 h, then was concentrated in vacuo. The crude oil waschromatographed (80 g SiO₂; continuous gradient from 0% to 40% EtOAc inhexane over 30 min) to give the title compound (5.90 g, 21.44 mmol, 98%yield) as a clear oil. ¹H NMR (400 MHz, CDCl₃) δ 7.41 (s, 1H), 4.76-4.54(m, 3H), 3.93 (s, 3H), 3.88 (ddd, J=11.4, 8.1, 3.2 Hz, 1H), 3.61-3.53(m, 1H), 1.89-1.49 (m, 6H).

16C.1-Methyl-5-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole

A mixture of compound 16B (2.00 g, 7.27 mmol), bis(pinacolato)diboron(2.77 g, 10.9 mmol), KOAc (2.85 g, 29.1 mmol) in 1,4-dioxane (20 mL) wasdegassed with N₂ for 5 min and Pd(dppf)Cl₂—CH₂Cl₂ (0.29 g, 0.363 mmol)was added. The reaction was stirred at 80° C. under N₂ for 18 h, thenwas cooled to RT and partitioned between CH₂Cl₂ and water (50 mL each).The mixture was stirred vigorously, after which the organic layer wasdried (NaSO₄), and concentrated in vacuo. The crude oil waschromatographed (80 g SiO₂; continuous gradient from 0% to 100% EtOAc inhexane over 25 min) to give the title compound (0.90 g, 2.79 mmol, 38.4%yield) as a light brownish oil. LCMS: m/z=323.0; ¹H NMR (500 MHz, CDCl₃)δ 7.69 (s, 1H), 4.94-4.76 (m, 2H), 4.69 (t, J=3.6 Hz, 1H), 3.95-3.86 (m,4H), 3.58-3.48 (m, 1H), 1.74-1.46 (m, 6H), 1.30 (s, 12H).

16D. (±)-Trans-ethyl3-((3-methyl-5-(1-methyl-5-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)-1H-pyrazol-4-yl)pyrazin-2-yl)oxy)cyclopentanecarboxylate

A degassed mixture of compound 13D (0.15 g, 0.456 mmol), Example 16Ccompound (0.22 g, 0.683 mmol), K₃PO₄ (0.2 g, 0.911 mmol), andPdCl₂(dppf)-CH₂Cl₂ adduct (0.02 g, 0.023 mmol) in 1,4-dioxane (10 mL)and water (0.1 mL) was stirred at 80° C. under N₂ for 18 h, then wasdiluted with water (25 mL) and extracted with EtOAc (2×50 mL). Thecombined organic layers were washed with water (50 mL), brine (50 mL),dried (Na₂SO₄), and concentrated in vacuo. The crude oil waschromatographed (12 g SiO₂; continuous gradient from 0% to 50% EtOAc inhexane over 10 min) to give the title compound (0.153 g, 0.344 mmol, 76%yield) as a clear oil. LCMS: m/z=445.0; ¹H NMR (400 MHz, CDCl₃) δ 8.10(s, 1H), 7.76 (s, 1H), 5.56-5.48 (m, 1H), 5.05-4.90 (m, 2H), 4.77-4.69(m, 1H), 4.16 (q, J=7.2 Hz, 2H), 3.98 (s, 3H), 3.95-3.81 (m, 2H),3.16-2.99 (m, 1H), 2.44 (d, J=0.7 Hz, 3H), 2.23-2.17 (m, 4H), 1.96-1.49(m, 8H), 1.27 (t, J=7.2 Hz, 3H).

16E. (±)-Trans-ethyl3-((5-(5-(hydroxymethyl)-1-methyl-1H-pyrazol-4-yl)-3-methyl-pyrazin-2-yl)oxy)cyclopentanecarboxylate

A mixture of compound 16D (153 mg, 0.344 mmol) and PPTS (86 mg, 0.344mmol) in EtOH (5 mL) was stirred at 50° C. for 3 h, then was cooled toRT and concentrated in vacuo. The residue was partitioned between EtOAcand water. The organic layer was washed with water, dried (MgSO₄), andconcentrated in vacuo. The crude oil was chromatographed (4 g SiO₂;continuous gradient from 0% to 100% EtOAc in hexane over 10 min) to givethe title compound (100 mg, 0.277 mmol, 81% yield) as a white solid.LCMS: m/z=361.0; ¹H NMR (500 MHz, CDCl₃) δ 8.22 (d, J=0.6 Hz, 1H), 7.75(s, 1H), 5.99 (br. s., 1H), 5.52 (tt, J=5.2, 2.4 Hz, 1H), 4.71 (br. s.,2H), 4.16 (q, J=7.2 Hz, 2H), 3.94 (s, 3H), 3.07 (quin, J=8.1 Hz, 1H),2.46 (s, 3H), 2.24-2.13 (m, 4H), 1.97-1.86 (m, 2H), 1.27 (t, J=7.2 Hz,3H).

16F. (±)-Trans-ethyl 3-((3-methyl-5-(1-methyl-5-((((4nitrophenoxy)carbonyl)oxy)methyl)-1H-pyrazol-4-yl)pyrazin-2-yl)oxy)cyclopentanecarboxylate

A solution of 4-nitrophenyl chloroformate (47.0 mg, 0.233 mmol) inCH₂Cl₂ (3 mL) was added dropwise to a solution of compound 16E (70 mg,0.194 mmol) and pyridine (0.079 mL, 0.971 mmol) in CH₂Cl₂ (5 mL) over 1h. The reaction was stirred at RT for 2 h, then was concentrated invacuo. The crude product was chromatographed (4 g SiO₂; continuousgradient from 0% to 50% EtOAc in hexane over 10 min) to give the titlecompound (90 mg, 0.171 mmol, 88% yield) as a light yellow oil.[M+H]⁺=526.0

16G. (±)-Trans-ethyl3-((5-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-pyrazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate

To a solution of compound 16F (93 mg, 0.177 mmol) in THE (1 mL) wasadded (cyclobutylmethyl)(methyl)amine (21 mg, 0.21 mmol) and iPr₂NEt(0.124 mL, 0.708 mmol). The reaction mixture was stirred at RT for 2 h,then was concentrated in vacuo. The crude product was chromatographed (4g SiO₂; continuous gradient from 0% to 30% EtOAc in hexane over 10 min)to give the title compound (80 mg, 0.165 mmol, 93% yield) as a clearoil. [M+H]⁺=486.1

Example 16

A solution of compound 16G (7 mg, 0.014 mmol) and 1N aq. NaOH (0.22 mL,0.22 mmol) in THE (0.5 mL) was stirred at RT for 18 h, then wasconcentrated in vacuo. The crude product was purified by preparativeHPLC (Sunfire C18 30×100 mm-regenerated column; detection at 220 nm;flow rate=40 mL/min; continuous gradient from 30% B to 100% B over 10min+2 min hold time at 100% B, where A=90:10:0.1 H₂O:MeCN: TFA andB=90:10:0.1 MeCN:H₂O:TFA) to give the title compound (6 mg, 0.01 mmol,71% yield) as a clear oil. [M+H]⁺=458.1; ¹H NMR (500 MHz, CDCl₃) δ 8.15(s, 1H), 7.87 (s, 1H), 5.60-5.54 (m, 1H), 5.50 (s, 2H), 4.03 (s, 3H),3.39-3.11 (m, 3H), 2.96-2.80 (m, 3H), 2.65-2.40 (m, 4H), 2.34-2.17 (m,4H), 2.09-1.69 (m, 7H), 1.65-1.54 (m, 1H); hLPA₁ IC₅₀=202 nM

Example 17. (±)-Trans-ethyl3-((5-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-pyrazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate(Single Enantiomer)

17A. (±)-Trans-Ethyl3-((5-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-pyrazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentane-1-carboxylate

One of enantiomers (30 mg, 99.5% ee) was separated from Example 16F (70mg, 0.144 mmol) by chiral SFC (Instrument: PIC Solution SFC, Column:Chiralpak IC, 30×250 mm, 5 □m; Mobile Phase: 40% MeOH/60% CO₂, FlowConditions: 85 mL/min, 110 Bar, 40° C., Detector Wavelength: 254 nm,Injection Details: 0.5 mL of 40 mg/mL solution in MeOH, peak 2). Theabsolute stereochemistry of Example 17A was not determined.

Example 17

A mixture of compound 17A (30 mg, 0.062 mmol) and 1 M aq. NaOH (0.62 mL,0.618 mmol) in THE (1 mL) was stirred at RT for 3 h, then wasconcentrated in vacuo and purified by preparative HPLC (Sunfire C1830×100 mm column; detection at 220 nm; flow rate=40 mL/min; continuousgradient from 30% B to 100% B over 10 min+2 min hold time at 100% B,where A=90:10:0.1 H₂O:MeCN:TFA and B=90:10:0.1 MeCN:H₂O:TFA) to give thetitle compound (30 mg, 0.051 mmol, 83% yield) as a clear oil. Theabsolute stereochemistry of Example 17 was not determined. [M+H]⁺=458.0;¹H NMR (500 MHz, CDCl₃) δ 8.21 (s, 1H), 7.90 (s, 1H), 5.57 (br s, 1H),5.48 (s, 2H), 4.05 (s, 3H), 3.38-3.20 (m, 2H), 3.16 (quin, J=8.0 Hz,1H), 2.95-2.82 (m, 3H), 2.65-2.43 (m, 4H), 2.35-2.18 (m, 4H), 2.10-1.55(m, 8H); hLPA₁ IC₅₀=416 nM.

Example 18.(±)-Trans-3-((5-(5-((((benzyloxy)carbonyl)amino)methyl)-1-methyl-1H-pyrazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylicAcid

18A. (±)-Trans-ethyl3-((5-(5-((((benzyloxy)carbonyl)amino)methyl)-1-methyl-1H-pyrazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate

A solution of compound 16E (33 mg, 0.092 mmol), benzylN-[(tert-butoxy)carbonyl]carbamate (35 mg, 0.137 mmol), n-Bu₃P (0.034mL, 0.137 mmol), and 1,1′(-azodicarbonyl)dipiperidine (35 mg, 0.137mmol) in toluene (2 mL) was stirred at 50° C. for 3 h, then was cooledto RT. TFA (1 mL) was added to the reaction mixture, which was stirredat RT for 1 h, then was concentrated in vacuo. The residue waspartitioned between EtOAc and water. The organic layer was washed withwater, dried (MgSO₄) and concentrated in vacuo. The crude oil waschromatographed (4 g SiO₂; continuous gradient from 0% to 50% EtOAc inhexane over 10 min) to give the title compound (40 mg, 0.081 mmol, 89%yield) as a clear oil. ¹H NMR (500 MHz, CDCl₃) δ 8.17 (s, 1H), 7.74 (s,1H), 7.44-7.30 (m, 5H), 6.54 (br. s., 1H), 5.58-5.49 (m, 1H), 5.12 (s,2H), 4.58 (d, J=6.1 Hz, 2H), 4.18 (q, J=7.2 Hz, 2H), 4.07 (s, 3H), 3.09(quin, J=8.0 Hz, 1H), 2.46 (s, 3H), 2.29-2.10 (m, 4H), 2.00-1.88 (m,2H), 1.29 (t, J=7.2 Hz, 3H).

Example 18

A solution of compound 18A (6.9 mg, 0.014 mmol) and 1 N aq. NaOH (0.2mL, 0.210 mmol) in THE (0.5 mL) was stirred at RT for 18 h, then wasconcentrated in vacuo. The crude product was purified by preparativeHPLC (Sunfire C18 30×100 mm column; detection at 220 nm; flow rate=40mL/min; continuous gradient from 30% B to 100% B over 10 min+2 min holdtime at 100% B, where A=90:10:0.1 H₂O:MeCN:TFA and B=90:10:0.1MeCN:H₂O:TFA) to give the title compound as the TFA salt (8 mg, 0.014mmol, 97% yield) as an oil. [M+H]⁺=466.0; ¹H NMR (500 MHz, CDCl₃) δ 8.22(s, 1H), 7.91 (s, 1H), 7.40-7.34 (m, 5H), 5.61-5.53 (m, 1H), 5.13 (s,2H), 4.61 (s, 2H), 4.15 (br. s., 3H), 3.22-3.12 (m, 1H), 2.50 (s, 3H),2.35-2.20 (m, 4H), 2.08-1.92 (m, 2H); hLPA₁ IC₅₀=369 nM.

Example 19.Trans-3-((5-(5-((((benzyloxy)carbonyl)amino)methyl)-1-methyl-1H-pyrazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylicAcid, Single Enantiomer; Absolute Configuration not Determined

19A. Trans-ethyl3-((5-(5-((((benzyloxy)carbonyl)amino)methyl)-1-methyl-1H-pyrazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentanecarboxylate(Single Enantiomer)

One of the two enantiomers were separated (30 mg, 99.5% ee) from Example18A (80 mg, 0.165 mmol) by chiral SFC (Instrument: PIC Solution SFC,Column: Chiralpak IC, 30×250 mm, 5 μm, Mobile Phase: 40% MeOH/60% CO₂,Flow Conditions: 85 mL/min, 110 Bar, 40° C., Detector Wavelength: 254nm, Injection Details: 0.5 mL of 10 mg/mL solution in MeOH, 2^(nd)eluting peak under these conditions). The absolute stereochemistry ofthe compound was not determined.

Example 19

A mixture of compound 19A (14 mg, 0.028 mmol) and 1 M aq. NaOH (0.284mL, 0.284 mmol) in THE (1 mL) was stirred at RT for 3 h, then wasconcentrated in vacuo. The residue was purified by preparative HPLC(Sunfire C18 30×100 mm column; detection at 220 nm; flow rate=40 mL/min;continuous gradient from 30% B to 100% B over 10 min+2 min hold time at100% B, where A=90:10:0.1 H₂O:MeCN:TFA and B=90:10:0.1 MeCN:H₂O:TFA) togive the title compound (13 mg, 0.022 mmol, 78% yield) as a clear oil.The absolute stereochemistry of the compound was not determined.[M+H]⁺=466.0; ¹H NMR (500 MHz, CDCl₃) δ 8.22 (s, 1H), 7.91 (s, 1H),7.40-7.34 (m, 5H), 5.61-5.53 (m, 1H), 5.13 (s, 2H), 4.61 (s, 2H), 4.15(br. s., 3H), 3.22-3.12 (m, 1H), 2.50 (s, 3H), 2.35-2.20 (m, 4H),2.08-1.92 (m, 2H), hLPA₁ IC₅₀=202 nM.

The examples in the following table was synthesized according to thegeneral methods described and the intermediates used for the synthesisof Example 4, 5 and 18.

Analytical & Biological Ex # Structure & Name Data Method 20

[M + H]⁺ = 466.3; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (br d, J = 7.6 Hz,1H), 7.67 (br s, 1H), 7.50-7.19 (m, 6H), 5.10-4.88 (m, 3H), 4.76 (br s,2H), 4.04 (br s, 3H), 3.62 (br s, 2H), 2.90 (br d, J = 7.0 Hz, 1H), 2.36(br s, 3H), 2.20-1.64 (m, 5H); hLPA₁ IC₅₀ = 39.7 nM. Example 18; inter-mediate used is Example 4B (±)-trans-3-((6-(5-((((benzyloxy)carbonyl)amino)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methyl-pyridin-3- yl)oxy)cyclopentane carboxylicacid 21

[M + H]⁺ = 466.0; ¹H NMR (400 MHz, CDCl₃) δ 13.92-13.24 (m, 1H),9.86-9.20 (m, 1H), 8.17-8.02 (m, 1H), 7.80 (br d, J = 8.8 Hz, 1H), 7.41-7.28 (m, 2H), 7.27-7.15 (m, 3H), 5.16-4.96 (m, 3H), 4.66-4.43 (m, 2H),4.21-4.01 (m, 3H), 3.28- 3.01 (m, 1H), 2.74-2.60 (m, 3H), 2.48-1.82 (m,6H); hLPA₁ IC₅₀ = 56 nM. Example 18; inter- mediate used is Example 4BTrans-3-((6-(5-((((benzyloxy)carbonyl) amino)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methyl-pyridin-3- yl)oxy)cyclopentane carboxylic acid(single enantiomer; absolute stereochemistry not determined) 22

[M + H]⁺ = 480.0; ¹H NMR (400 MHz, CDCl₃) δ 8.17-8.09 (m, 1H), 7.83-7.74(m, 1H), 7.39-7.28 (m, 3H), 7.19 (br d, J = 6.8 Hz, 1H), 7.10 (br d, J =6.8 Hz, 1H), 5.61- 5.39 (m, 2H), 5.07 (br s, 1H), 4.49 (br d, J = 17.2Hz, 2H), 4.28-3.79 (m, 3H), 3.21-3.06 (m, 1H), 3.02- 2.86 (m, 3H), 2.71(d, J = 9.7 Hz, 3H), 2.41-2.13 (m, 4H), 2.02 (td, J = 12.5, 6.5 Hz, 2H);hLPA₁ IC₅₀ = 182 nM. Examples 4/5; inter- mediate Example 4B(±)-trans-3-((6-(5-(((benzyl(methyl) carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methyl pyridin-3- yl)oxy)cyclopentane carboxylicacid 23

[M + H]⁺ = 432.0; ¹H NMR (500 MHz, CDCl₃) δ 8.02 (d, J = 8.8 Hz, 1H),7.50 (dd, J = 8.4, 4.5 Hz, 1H), 5.67-5.55 (m, 2H), 5.00 (br. s., 1H),4.17 (s, 3H), 3.27-3.10 (m, 3H), 2.89 (d, J = 11.6 Hz, 3H), 2.60 (s,3H), 2.34-2.14 (m, 4H), 2.07-1.93 (m, 2H), 1.63-1.44 (m, 2H), 0.93- 0.77(m, 3H); hLPA₁ IC₅₀ = 2,044 nM. Examples 4/5; inter- mediate Example 4B(±)-trans-3-((2-methyl-6-(1-methyl-5-(((methyl(propyl)carbamoyl)oxy)methyl)- 1H-1,2,3-triazol-4-yl)pyridin-3-yl)oxy)cyclopentanecarboxylic acid 24

[M + H]⁺ = 446.1; ¹H NMR (500 MHz, CDCl₃) δ 8.12 (d, J = 8.5 Hz, 1H),7.75 (t, J = 8.0 Hz, 1H), 5.63-5.49 (m, 2H), 5.08 (br. s., 1H), 4.22 (d,J = 8.0 Hz, 3H), 3.21-3.07 (m, 3H), 2.95 (d, J = 9.6 Hz, 3H), 2.71 (d, J= 4.7 Hz, 3H), 2.39-2.17 (m, 4H), 2.10-1.85 (m, 3H), 0.90 (d, J = 6.6Hz, 6H); hLPA₁ IC₅₀ = 1,156 nM. Examples 4/5; inter- mediate Example 4B(±)-trans-3-((6-(5-(((isobutyl (methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2- methylpyridin-3-yl)oxy)cyclopentanecarboxylic acid 25

[M + H]⁺ = 444.1; ¹H NMR (500 MHz, DMSO-d₆) δ 8.29 (br s, 1H), 7.98 (brd, J = 8.7 Hz, 1H), 7.49 (br dd, J = 8.8, 2.2 Hz, 1H), 5.70-5.52 (m,2H), 5.01 (br s, 1H), 4.10 (br d, J = 9.4 Hz, 3H), 3.30- 3.08 (m, 1H),2.95-2.82 (m, 1H), 2.74 (br d, J = 15.1 Hz, 3H), 2.39-2.26 (m, 1H),2.21-1.40 (m, 13H); hLPA₁ IC₅₀ = 354 nM. Examples 4/5(±)-trans-3-((6-(5-((((cyclobutyl- methyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)pyridin- 3-yl)oxy)cyclopentane carboxylicacid

Example 26.(±)-2-(Trans-3-((5-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentyl)aceticAcid and Active Enantiomer

26A.(±)-(4-(5-((trans-3-(2-diazoacetyl)cyclopentyl)oxy)-6-methylpyrazin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methyl(cyclobutylmethyl)(methyl)carbamate

Oxalyl chloride (0.038 mL, 0.436 mmol) was added to a solution ofExample 13 (100 mg, 0.218 mmol) in CH₂Cl₂ (1 mL), along with a catalyticamount of DMF at 0° C. The reaction was stirred at RT for 1 h, then wasconcentrated in vacuo. The residue was dissolved in THF/MeCN (1:1; 1.0mL) and TMSCHN₂ (0.218 mL of a 2 M solution in hexane, 0.436 mmol) wasadded at 0° C. The reaction was allowed to warm to RT and stirred at RTfor 18 h, then was concentrated in vacuo. The crude oily product waschromatographed (4 g SiO₂; continuous gradient from 0% to 50% EtOAc inhexane over 10 min) to give the title compound (53 mg, 0.110 mmol, 50.4%yield) as a light yellowish oil. [M+H]⁺=483.2

Example 26

a mixture of compound 26A (53 mg, 0.110 mmol) and silver benzoate (50mg, 0.220 mmol) in 1,4-dioxane (2 mL)/H₂O (0.2 mL) was stirred at 70° C.for 5 h, then was cooled to RT and diluted with EtOAc (5 mL). Themixture was washed with 1N aq. HCl (5 mL), water (5 mL), and filtered.The filtrate was concentrated in vacuo. The crude oil was purified bypreparative HPLC (Sunfire C18 30×100 mm column; detection at 220 nm;flow rate=40 mL/min; continuous gradient from 30% B to 100% B over 10min+2 min hold time at 100% B, where A=90:10:0.1 H₂O:MeCN:TFA andB=90:10:0.1 MeCN:H₂O:TFA) to give the title compound (47 mg, 0.097 mmol,89% yield) as a light brownish oil. [M+H]⁺=473.4; ¹H NMR (400 MHz,CDCl₃) δ 8.65 (s, 1H), 5.64 (s, 2H), 5.54-5.39 (m, 1H), 4.17 (s, 3H),3.40-3.10 (m, 2H), 2.94-2.75 (m, 3H), 2.69-1.47 (m, 18H), 1.42-1.21 (m,1H); hLPA₁ IC₅₀=371 nM.

Examples 27 & 28.2-(trans-3-((5-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-3-methylpyrazin-2-yl)oxy)cyclopentyl)aceticAcid, Enantiomers

The enantiomers of Example 26 (41 mg, 0.087 mmol) were separated bychiral SFC (Instrument: PIC Solution SFC Prep-200, Column: ChiralpakOJ-H, 21×250 mm, 5 μm Mobile Phase: 10% MeOH/90% CO₂ Flow Conditions: 45mL/min, 120 Bar, 40° C. Detector Wavelength: 248 nm Injection Details:0.5 mL of ˜21 mg/mL in MeOH) to give the a faster eluting enantiomer(7.4 mg, 0.015 mmol, 17.7% yield) and the other, slower elutingenantiomer (5.6 mg, 0.012 mmol, 13.4% yield) as clear oils.

Example 27 (the faster eluting enantiomer; absolute stereochemistryundetermined): [M+H]⁺=473.3; ¹H NMR (400 MHz, CDCl₃) δ 8.65 (s, 1H),5.64 (s, 2H), 5.54-5.39 (m, 1H), 4.17 (s, 3H), 3.40-3.10 (m, 2H),2.94-2.75 (m, 3H), 2.69-1.47 (m, 18H), 1.42-1.21 (m, 1H), hLPA₁ IC₅₀=260nM.

Example 28 (the slower eluting enantiomer; absolute stereochemistryundetermined): [M+H]⁺=473.3; ¹H NMR (400 MHz, CDCl₃) δ 8.65 (s, 1H),5.64 (s, 2H), 5.54-5.39 (m, 1H), 4.17 (s, 3H), 3.40-3.10 (m, 2H),2.94-2.75 (m, 3H), 2.69-1.47 (m, 18H), 1.42-1.21 (m, 1H); hLPA₁IC₅₀=3750 nM.

Example 29:(±)2-(Trans-3-((6-(3-methyl-4-(((4-(pyridin-2-yl)pyrimidin-2-yl)amino)methyl)isoxazol-5-yl)pyridin-3-yl)oxy)cyclopentyl)acetic Acid

29A. (5-(5-bromopyridin-2-yl)-3-methylisoxazol-4-yl)methanol

A solution of 1M BH₃.THF in THE (14.8 mL, 14.8 mmol) was added dropwiseto a solution of 5-(5-bromopyridin-2-yl)-3-methylisoxazole-4-carboxylicacid (1.67 g, 5.90 mmol) (prepared according to the procedure ofNagasue, H., JP 2017095366) in THE (25 mL). The reaction was stirred at60° C. for 2 h, then was cooled to 0° C. and cautiously quenched withHOAc (1 mL) and MeOH (10 mL) at 0° C. The mixture was allowed to warm toRT and stirred at RT for 30 min, then was concentrated in vacuo. MeOH(30 mL) was added and the mixture was stirred for 30 min at RT, then wasconcentrated in vacuo. The residue was diluted with satd aq. NaHCO₃ (15mL) and extracted with EtOAc (5×20 mL). The combined organic extractswere washed with brine, dried (MgSO₄) and concentrated in vacuo. Thecrude product was chromatographed (40 g SiO₂, continuous gradient from 0to 100% EtOAc over 15 min) to afford the title compound (1.20 g, 4.46mmol, 76% yield) as a white solid. ¹H NMR (500 MHz, CDCl₃) δ 8.75 (dd,J=2.3, 0.7 Hz, 1H), 8.05 (dd, J=8.5, 2.4 Hz, 1H), 7.90 (dd, J=8.5, 0.8Hz, 1H), 4.63 (s, 2H), 2.36 (s, 3H); [M+H]⁺=269.

29B. 4-(bromomethyl)-5-(5-bromopyridin-2-yl)-3-methylisoxazole

PBr₃ (0.21 mL, 2.23 mmol) was added to a solution of compound 29A (200mg, 0.743 mmol) in DME (10 mL) at 0° C. The reaction mixture was allowedto warm to RT and stirred for 2 h at RT, then was cooled to 0° C. andneutralized to pH 7 with sat'd aq. NaHCO₃. The mixture was partitionedbetween CH₂Cl₂ (10 mL) and H₂O (10 mL), and the aqueous layer wasextracted with CH₂Cl₂ (3×10 mL). The combined organic extracts weredried (MgSO₄) and concentrated in vacuo. The residue was chromatographed(24 g SiO₂, continuous gradient from 0 to 50% EtOAc in hexanes over 15min) to provide the title compound (240 mg, 0.723 mmol, 97% yield) as awhite solid. ¹H NMR (500 MHz, CDCl₃) δ 8.82 (dd, J=2.5, 0.7 Hz, 1H),7.99 (dd, J=8.5, 2.3 Hz, 1H), 7.83 (dd, J=8.4, 0.8 Hz, 1H), 4.97 (s,2H), 2.44 (s, 3H); [M+H]⁺=330.9.

29C.N-((5-(5-bromopyridin-2-yl)-3-methylisoxazol-4-yl)methyl)-4-(pyridin-2-yl)pyrimidin-2-amine

To a solution of 4-(pyridin-2-yl)pyrimidin-2-amine (270 mg, 1.57 mmol)in THE (10 mL) was added n-BuLi (0.98 mL of a 1.6 M solution in hexane,1.57 mmol) at −78° C. The reaction mixture was allowed to warm to RT andstirred for 5 min at RT. This solution was added quickly to a solutionof compound 29B (400 mg, 1.21 mmol) in THE (20 mL) at RT. The reactionmixture was stirred at RT for 24 h, then was diluted with H₂O (10 mL)and extracted with EtOAc (3×5 mL). The combined organic extracts weredried (MgSO₄) and concentrated in vacuo. The residue was chromatographed(40 g SiO₂, continuous gradient from 0 to 100% EtOAc in hexanes over 15min) to provide the title compound (190 mg, 0.449 mmol, 37.3% yield) asa white solid. ¹H NMR (500 MHz, CDCl₃) δ 8.69 (d, J=2.2 Hz, 1H), 8.55(dt, J=4.8, 1.3 Hz, 1H), 8.29 (d, J=5.2 Hz, 1H), 8.20 (d, J=7.9 Hz, 1H),7.84 (d, J=2.4 Hz, 1H), 7.69 (d, J=8.3 Hz, 1H), 7.66 (dd, J=7.8, 1.8 Hz,1H), 7.44 (d, J=5.0 Hz, 1H), 7.23 (ddd, J=7.5, 4.8, 1.2 Hz, 1H), 6.32(t, J=6.5 Hz, 1H), 4.71 (d, J=6.4 Hz, 2H); [M+H]⁺=423.1.

29D.6-(3-methyl-4-(((4-(pyridin-2-yl)pyrimidin-2-yl)amino)methyl)isoxazol-5-yl)pyridin-3-ol

A solution of compound 29C (180 mg, 0.425 mmol), bis(pinacolato) diboron(162 mg, 0.638 mmol), and KOAc (167 mg, 1.701 mmol) in 1,4-dioxane (4mL) was degassed by bubbling N₂ through the solution. After 5 min,PdCl₂(dppf) (31 mg, 0.043 mmol) was added and the mixture was furtherdegassed by bubbling N₂ through the solution for 2 min. The reactionmixture was sealed and heated at 80° C. for 16 h, then was cooled to RT.Water (2 mL) was added and the mixture was extracted with EtOAc (3×5mL). The combined organic extracts were washed with brine (5 mL), dried(MgSO₄) and concentrated in vacuo.

The crude product was dissolved in EtOAc (5 mL) and cooled to 0° C. Aq.30% H₂O₂ (0.065 mL, 2.13 mmol) was added dropwise. The reaction wasstirred at 0° C. for 15 min, then was allowed to warm to RT, stirred atRT for 1 h, then was cooled to 0° C. and quenched with satd aq. Na₂S₂O₃(5 mL) and extracted with EtOAc (3×5 mL). The combined organic extractswere washed with brine (5 mL), dried (MgSO₄) and concentrated in vacuo.The residue was chromatographed (12 g SiO₂; continuous gradient from 0to 100% EtOAc in CH₂Cl₂, then hold at 100% EtOAc for 10 min) to affordthe title compound (90 mg, 0.250 mmol, 58.7% yield) as a white solid. ¹HNMR (500 MHz, DMSO-d₆) δ 8.68 (d, J=4.7 Hz, 1H), 8.44 (s, 1H), 8.35 (d,J=2.8 Hz, 1H), 8.03 (br s, 1H), 7.93-7.77 (m, 2H), 7.50 (t, J=6.0 Hz,2H), 7.36 (dd, J=8.6, 2.8 Hz, 1H). [M+H]⁺=361.2.

Example 29

To a solution of compound 29D (8 mg, 0.022 mmol), (±)-(isopropyl2-cis-3-hydroxycyclopentyl)acetate (8 mg, 0.044 mmol), and Ph₃P (11 mg,0.055 mmol) in toluene (1 mL) was added(E)-diazene-1,2-diylbis(piperidin-1-ylmethanone; 14 mg, 0.055 mmol). Thereaction mixture was stirred overnight at RT, then was concentrated invacuo. The residue was dissolved in a solution of LiOH.H₂O (5 mg, 0.12mmol) in 1:1 THF:water (1 mL each), and MeOH (1 mL) was added. Thereaction mixture was stirred for 20 h at RT, then was acidified to pH ˜4with 1N aq. HCl and extracted with EtOAc (3×5 mL), dried (Na₂SO₄) andconcentrated in vacuo. The crude residue was dissolved in DMF andpurified by preparative LC/MS: Column: XBridge C18, 19×200 mm, 5-μmparticles; Mobile Phase A: 5:95 MeCN:H₂O with 0.1% TFA; Mobile Phase B:95:5 MeCN:H₂O with 0.1% TFA; Gradient: 10-50% B over 20 min, then a5-min hold at 100% B; Flow rate: 20 mL/min. Fractions containing thedesired product were combined and dried via centrifugal evaporation toprovide the title compound (3.1 mg, 0.0052 mmol, 23% yield; purity byLCMS analysis=100%). ¹H NMR (500 MHz, DMSO-d₆) δ 8.67 (d, J=4.7 Hz, 1H),8.47-8.41 (m, 2H), 7.99 (br s, 1H), 7.86 (d, J=8.8 Hz, 1H), 7.76 (br s,1H), 7.55 (dd, J=8.8, 3.0 Hz, 1H), 7.52-7.42 (m, 2H), 4.98 (s, 1H), 4.85(s, 2H), 2.44-2.21 (m, 7H), 2.04-1.77 (m, 3H), 1.47-1.35 (m, 2H);[M+H]⁺=487.2; hLPA1 IC₅₀=54 nM.

Example 30.(±)-Cis-3-(((6-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)methyl)cyclopentane-1-carboxylicAcid

30A. 3-(5-bromo-6-methylpyridin-2-yl)prop-2-yn-1-ol

A solution of 3,6-dibromo-2-methylpyridine (3.0 g, 11.96 mmol), Et₃N(5.00 mL, 35.9 mmol) and prop-2-yn-1-ol (1.044 mL, 17.93 mmol) in MeCN(25 mL) was degassed with N₂ (sparged 3× with N₂). Pd(dppf)Cl₂ (0.874 g,1.196 mmol) and CuI (0.114 g, 0.598 mmol) were added and the mixture wasdegassed with N₂ again. The reaction mixture was heated at 50° C. for 3h, then was cooled to RT. The mixture was filtered through a Celiteplug, which was washed with EtOAc (3×50 mL). The combined filtrates wereconcentrated in vacuo. The residue was chromatographed (SiO₂; continuousgradient from 0% to 100% EtOAc in hexanes over 20 min) to give the titlecompound as a white solid (1.81 g, 67% yield). ¹H NMR (500 MHz, CDCl₃) δ7.77 (d, J=8.2 Hz, 1H), 7.14 (d, J=8.2 Hz, 1H), 4.51 (s, 2H), 2.66 (s,3H).

30B.(4-(5-bromo-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methanol

To a solution of (pentamethylcyclopentadienyl)Ru(II)(Ph₃P)₂Cl (440 mg,0.553 mmol) in 1,4-dioxane (100 mL) was added compound 30A (5.00 g,15.92 mmol). The mixture was degassed (evacuation/releasing into Ar;repeated 3×) and TMSCH₂N₃ (4.09 g, 28.8 mmol) was added. The mixture wasdegassed with Ar (evacuation/releasing into Ar; repeated 3×). Thehomogeneous reaction mixture was then heated at 50° C. for 20 h, thenwas cooled to RT and concentrated in vacuo. The residue was dissolved inTHE (60 mL), after which TBAF (31.8 mL of a 1M solution in THF, 31.8mmol) was added. The reaction mixture was stirred at RT for 30 min, thenwas quenched with satd aq. NaHCO₃ (50 mL) and extracted with EtOAc (4×50mL). The combined organic extracts were washed with brine (40 mL), dried(MgSO₄) and concentrated in vacuo. The crude product was chromatographedseveral times (330 g SiO₂ column; continuous gradient from 0% to 100%EtOAc in hexanes over 35 min, then hold at 100% EtOAc for 5 min) toafford the title compound (3.0 g, 10.60 mmol, 66.5% yield) as a whitesolid. The regiochemistry of the triazole was confirmed by 1D-nOe NMRexperiments. ¹H NMR (500 MHz, CDCl₃) δ 8.02 (d, J=8.2 Hz, 1H), 7.49 (d,J=8.2 Hz, 1H), 4.82 (d, J=6.3 Hz, 2H), 4.29 (s, 3H), 3.39 (br s, 1H),2.77 (s, 3H).

30C.(4-(5-bromo-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methyl(4-nitrophenyl) carbonate

To a solution of compound 30B and 4-nitrophenyl chloroformate (1645 mg,8.16 mmol) in THE (50 mL) was added pyridine (1.32 mL, 16.32 mmol) atRT, after which a white solid was formed. The reaction mixture wasstirred at RT for 16 h, then was concentrated in vacuo. The crudeproduct was chromatographed (330 g SiO₂; continuous gradient from 0 to100% EtOAc in CH₂Cl₂ over 15 min) to afford the title compound (2.3 g,5.13 mmol, 94% yield) as a white solid. ¹H NMR (500 MHz, CDCl₃) δ8.34-8.27 (m, 2H), 7.98 (d, J=8.4 Hz, 1H), 7.93 (d, J=8.3 Hz, 1H),7.43-7.36 (m, 2H), 6.05 (s, 2H), 4.25 (s, 3H), 2.70 (s, 3H); LCMS,[M+H]⁺=448.0.

30D.(4-(5-bromo-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methyl(cyclobutyl-methyl)(methyl)carbamate

To a solution of compound 30C (6.5 g, 14.50 mmol) in THF (100 mL) added1-cyclobutyl-N-methylmethanamine (1.817 g, 17.40 mmol) and iPr₂NEt(10.13 mL, 58.0 mmol). The reaction mixture was stirred at RT for 16 h,then was concentrated in vacuo. The residue was chromatographed (330 gSiO₂; continuous gradient from 0 to 50% EtOAc in CH₂Cl₂ over 20 min) toafford the title compound (6.0 g, 14.70 mmol, 101% yield) as a whitesolid. ¹H NMR (400 MHz, CDCl₃; mixture of rotamers) δ 7.96-7.78 (m, 2H),5.75 (s, 1H), 5.73 (s, 1H), 4.16 (s, 1.5H), 4.13 (s, 1.5H), 3.32 (d,J=7.4 Hz, 1H), 3.16 (d, J=7.3 Hz, 1H), 2.88 (s, 1.5H), 2.78 (s, 1.5H),2.68 (s, 3H), 2.64-2.50 (m, 0.5H), 2.39 (q, J=7.9 Hz, 0.5H), 2.07-1.49(m, 6H); LCMS, [M+H]⁺=409.0.

30E.(4-(5-hydroxy-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazol-5-yl)methyl(cyclobutyl-methyl)(methyl)carbamate

To a degassed (sparged with Ar 3×) solution of compound 30D (6.0 g, 14.7mmol), bis(pinacolato)diboron (5.60 g, 22.04 mmol), and KOAc (5.77 g,58.8 mmol) in 1,4-dioxane (100 mL) was added Pd(dppf)Cl₂ (1.075 g, 1.470mmol). The reaction was heated at 80° C. for 16 h under Ar, then wascooled to RT. Water (50 mL) was added and the mixture was extracted withEtOAc (3×50 mL). The combined organic extracts were washed with water(50 mL), brine (50 mL), dried (MgSO₄) and concentrated in vacuo. Thecrude pinacol boronate was used in the next step without furtherpurification.

To a 0° C. solution of the crude pinacol boronate in EtOAc (75 mL) wasadded 30% aq. H₂O₂ (6.43 mL, 73.5 mmol) portionwise. The reaction wasstirred at 0° C. for 15 min, then was warmed to RT and stirred for 1 hat RT. The reaction was cooled 0° C. and quenched with satd aq. Na₂S₂O₃(20 mL) and extracted with EtOAc (3×50 mL). The combined organicextracts were dried (MgSO₄) and concentrated in vacuo. The residue washeated at 60° C. in EtOAc (50 mL) and CH₂Cl₂ (10 mL) until all solidswere dissolved, then was cooled to RT. The solid was filtered off toafford the title compound as a slightly off-white solid (2.3 g). Thefiltrate was concentrated in vacuo, then was chromatographed (330 g ISCOGold SiO₂ column; continuous gradient from 0 to 100% EtOAc in CH₂Cl₂over 20 min, then hold at 100% EtOAc for 10 min) to afford an additional2.0 g of title compound to provide a combined total of 4.3 g of titlecompound (12.45 mmol, 85% yield) as a white solid. ¹H NMR (500 MHz,CDCl₃) δ 7.80 (d, J=8.3 Hz, 1H), 7.08 (d, J=8.3 Hz, 1H), 6.49 (s, 1H),5.81-5.68 (m, 2H), 4.17-4.11 (m, 3H), 3.32 (d, J=7.4 Hz, 1H), 3.18 (d,J=7.3 Hz, 1H), 2.88 (s, 1.5H), 2.80 (s, 1.5H), 2.56 (q, J=8.2 Hz, 0.5H),2.50 (s, 3H), 2.48-2.37 (m, 0.5H), 2.07-1.47 (m, 6H); LCMS,[M+H]⁺=346.3.

30F. Methylcis-3-(((6-(5-((((cyclobutylmethyl)(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)methyl)cyclopentane-1-carboxylate

A mixture of compound 30E (100 mg, 0.290 mmol), cis-methyl3-(hydroxymethyl) cyclopentanecarboxylate (82 mg, 0.521 mmol), n-Bu₃P(0.181 mL, 0.724 mmol) and(E)-diazene-1,2-diylbis(piperidin-1-ylmethanone) (183 mg, 0.724 mmol) intoluene (10 mL) was heated at 80° C. for 2 h, then was cooled to RT. Themixture was diluted with CH₂Cl₂ (5 mL) and filtered through Celite®,which was washed with additional CH₂Cl₂ (5 mL). The combined filtrateswere concentrated in vacuo, and the residue was chromatographed (SiO₂;continuous gradient from 0% to 100% EtOAc in hexanes, 20 min) to givethe title compound (141 mg, 0.290 mmol, 100% yield) as an oil. ¹H NMR(400 MHz, CDCl₃) δ 7.96 (d, J=8.4 Hz, 1H), 7.16 (d, J=8.6 Hz, 1H), 5.77(br s, 2H), 4.16 (br s, 3H), 3.96 (dd, J=6.7, 3.7 Hz, 2H), 3.71 (s, 3H),3.34 (d, J=7.4 Hz, 1H), 3.18 (d, J=7.4 Hz, 1H), 2.95-2.77 (m, 4H),2.64-2.52 (m, 1H), 2.50 (s, 3H), 2.48-2.36 (m, 1H), 2.31-1.51 (m, 13H);LCMS, [M+H]⁺=486.3.

Example 30

A mixture of compound 30F (141 mg, 0.290 mmol) and LiOH.H₂O (61 mg, 1.45mmol) in 1:1 THF:water (1 mL each) was stirred at RT for 4 h. Thereaction was acidified to pH=4 with 1N aq. HCl, extracted with EtOAc(3×5 mL). The combined organic extracts were dried (Na₂SO₄) andconcentrated in vacuo. The crude product was purified by preparativeLC/MS using the following conditions: Column: XBridge C18, 19×200 mm,5-μm particles; Mobile Phase A: 5:95 MeCN:H₂O with 10-mM aq. NH₄OAc;Mobile Phase B: 95:5 MeCN:H₂O with 10-mM aq. NH₄OAc; Gradient: 20-60% Bover 20 min, then a 5-min hold at 100% B; Flow: 20 mL/min. Fractionscontaining the desired product were combined and dried via centrifugalevaporation. The yield of the product was 96.0 mg, and its estimatedpurity by LCMS analysis was 100%. Two analytical LC/MS injections wereused to determine the final purity. Injection 1 conditions: Column:Waters Acquity UPLC BEH C18, 2.1×50 mm, 1.7-μm particles; Mobile PhaseA: 5:95 MeCN:H₂O with 10 mM NH₄OAc; Mobile Phase B: 95:5 MeCN:H₂O with10 mM NH₄OAc; Temperature: 50° C.; Gradient: 0-100% B over 3 min, then a0.75-min hold at 100% B; Flow: 1.0 mL/min; Detection: UV at 220 nm.Injection 2 conditions: Column: Waters Acquity UPLC BEH C18, 2.1×50 mm,1.7-μm particles; Mobile Phase A: 5:95 MeCN:H₂O with 0.1% TFA; MobilePhase B: 95:5 MeCN:H₂O with 0.1% TFA; Temperature: 50° C.; Gradient:0-100% B over 3 minutes, then a 0.75-min hold at 100% B; Flow: 1.0mL/min; Detection: UV at 220 nm. LCMS, [M+H]⁺=472.1; ¹H NMR (500 MHz,DMSO-d₆) δ 7.84 (d, J=8.5 Hz, 1H), 7.43 (d, J=8.6 Hz, 1H), 5.62 (br s,2H), 4.09 (br s, 3H), 3.97 (d, J=6.6 Hz, 2H), 3.23 (br s, 1H), 3.10 (brs, 1H), 2.75 (br s, 3H), 2.71 (br s, 2H), 2.45-2.35 (m, 4H), 2.30 (s,1H), 2.10 (dt, J=12.7, 7.9 Hz, 1H), 1.98-1.39 (m, 10H); hLPA1 IC₅₀=21nM.

Examples 31 and 32

The above racemic Example 30 was separated by chiral SFC using thefollowing conditions: Column: Chiralcel OJ-H, 30×250 mm, 5 μm; FlowRate: 100 mL/min; Oven Temperature: 40° C.; BPR Setting: 120 bar; UVwavelength: 220 nm; Mobile Phase: 85% C02/15% Isopropanol −0.1% DEA(isocratic); Injection: 1500 uL of 93 mg/5 mL Methanolchiral column toafford two enantiomers. The chiral purity of both compounds aredetermined to be >95% ee under the following analytical conditions:Column: Chiralcel OJ-H, 4.6×100 m, 5 m (analytical); Flow Rate: 2mL/min; Oven Temperature: 40° C.; BPR setting: 1700 psi; UV wavelength:220 nm; Mobile Phase: 85% CO₂/15% iPrOH-0.1% Et₂NH (isocratic).

Example 31 (first eluting enantiomer): ¹H NMR (500 MHz, DMSO-d₆) δ 7.84(d, J=8.5 Hz, 1H), 7.43 (d, J=8.6 Hz, 1H), 5.62 (br s, 2H), 4.09 (br s,3H), 3.97 (d, J=6.6 Hz, 2H), 3.23 (br s, 1H), 3.10 (br s, 1H), 2.75 (brs, 3H), 2.71 (br s, 2H), 2.45-2.35 (m, 4H), 2.30 (s, 1H), 2.10 (dt,J=12.7, 7.9 Hz, 1H), 1.98-1.39 (m, 10H). LCMS, [M+H]⁺=472.1; hLPA1IC₅₀=10.8 nM.

Example 32 (second eluting enantiomer): ¹H NMR (500 MHz, DMSO-d₆) δ 7.84(d, J=8.5 Hz, 1H), 7.43 (d, J=8.6 Hz, 1H), 5.62 (br s, 2H), 4.09 (br s,3H), 3.97 (d, J=6.6 Hz, 2H), 3.23 (br s, 1H), 3.10 (br s, 1H), 2.75 (brs, 3H), 2.71 (br s, 2H), 2.45-2.35 (m, 4H), 2.30 (s, 1H), 2.10 (dt,J=12.7, 7.9 Hz, 1H), 1.98-1.39 (m, 10H). LCMS, [M+H]⁺=472.1; hLPA1IC₅₀=9.7 nM.

The examples in the following table were synthesized according to themethods and procedures described for the preparation of Examples 29 and30.

Analytical & Biological Ex # Structure & Name Data Method 33

  cis-3-(((6-(3-methyl-4-(((4-(pyridin-2- LCMS, [M + H]⁺ = 487.3; ¹H NMR(500 MHz, DMSO-d₆) δ 8.68 (d, J = 4.6 Hz, 1H), 8.51 (d, J = 2.8 Hz, 1H),8.48-8.37 (m, 1H), 7.96 (br s, 1H), 7.87 (d, J = 8.8 Hz, 1H), 7.76 (brs, 1H), 7.60 (dd, J = 8.8, 2.9 Hz, 1H), 7.49 (d, J = 4.9 Hz, 2H), 4.86(s, 2H), 4.07 (d, J = 6.9 Hz, 2H), 2.82-2.71 (m, 1H), 2.46-2.37 (m, 1H),2.33 (s, 3H), 2.10 (dt, J = 14.4, 7.5 Hz, 1H), 1.92- 1.75 (m, 3H),1.61-1.43 (m, 2H); hLPA1 IC₅₀ = 40 nM. Examples 29/30; Interme- diate 13yl)pyrimidin-2-yl)amino)methyl) isoxazol-5-yl)pyridin-3-yl)oxy)methyl)cyclopentane-1-carboxylic acid 34

LCMS, [M + H]⁺ = 473.0; ¹H NMR (500 MHz, DMSO-d₆) δ 8.82-8.60 (m, 1H),8.46 (br s, 2H), 8.00 (br s, 1H), 7.86 (d, J = 8.1 Hz, 1H), 7.77 (br s,1H), 7.56 (br s, 1H), 7.49 (br s, 2H), 5.09 (br s, 1H), 4.85 (br s, 2H),3.39 (br s, 1H), 2.93 (br s, 1H), 2.33 (s, 3H), 2.25- 1.71 (m, 6H);hLPA1 IC₅₀ = 247 nM. Example 29; Interme- diate 13trans-3-((6-(3-methyl-4-(((4-(pyridin-2- yl)pyrimidin-2-yl)amino)methyl)isoxazol-5-yl)pyridin-3-yl)oxy)cyclo- pentane-1-carboxylic acid 35

LCMS, [M + H]⁺ = 501.1; ¹H NMR (500 MHz, DMSO-d₆) δ 8.65 (s, 1H), 8.42(s, 1H), 8.04 (br s, 1H), 7.84-7.74 (m, 1H), 7.71 (d, J = 8.4 Hz, 1H),7.57-7.43 (m, 4H), 4.82 (br s, 2H), 4.03 (br s, 2H), 2.43 (s, 3H), 2.32(s, 3H), 2.12-1.38 (m, 7H). (The —CHCO₂H on the cyclopentane is notobserved due to water-suppression); hLPA1 IC₅₀ = 9 nM. Examples 29/30;Interme- diate 14 cis-3-(((2-methyl-6-(3-methyl-4-(((4-(pyridin-2-yl)pyrimidin-2-yl)amino) methyl)isoxazol-5-yl)pyridin-3-yl)oxy)methyl)cyclopentane-1-carboxylic acid 36

LCMS, [M + H]⁺ = 501.2; ¹H NMR (500 MHz, DMSO-d₆) δ 8.67 (d, J = 4.7 Hz,1H), 8.46 (s, 1H), 8.11- 7.93 (m, 1H), 7.87 (d, J = 8.5 Hz, 1H), 7.82(s, 1H), 7.49 (dt, J = 21.1, 6.8 Hz, 3H), 5.15 (s, 2H), 4.14 (s, 3H),2.79-2.63 (m, 1H), 2.42 (s, 3H), 2.12-1.16 (m, 7H). (The —OCH₂ off thecyclopentane is not observed due to water-suppression); hLPA1 IC₅₀ = 119nM. Examples 29/30; Interme- diate 15cis-3-(((2-methyl-6-(1-methyl-5-(((4-(pyridin-2-yl)pyrimidin-2-yl)amino)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3- yl)oxy)methyl)cyclopentane-1-carboxylic acid 37

LCMS, [M + H]⁺ = 487.0. ¹H NMR (500 MHz, DMSO-d₆) δ 8.67 (d, J = 4.7 Hz,1H), 8.46 (s, 1H), 8.41 (d, J = 2.9 Hz, 1H), 8.03 (d, J = 8.7 Hz, 1H),7.90-7.60 (m, 3H), 7.60-7.45 (m, 3H), 5.15 (s, 2H), 4.14 (s, 3H), 4.03(d, J = 6.9 Hz, 2H), 2.75 (quin, J = 8.2 Hz, 1H), 2.41 (p, J = 7.7 Hz,1H), 2.10 (dt, J = 13.1, 7.8 Hz, 1H), 1.83 (q, J = 12.7, 11.1 Hz, 3H),1.63-1.40 (m, 2H). hLPA1 IC₅₀ = 172 nM. Example 29, 30 Interme- diate 16cis-3-(((6-(1-methyl-5-(((4-(pyridin-2-yl)pyrimidin-2-yl)amino)methyl)-1H- 1,2,3-triazol-4-yl)pyridin-3-yl)oxy)methyl)cyclopentane-1- carboxylic acid 38

LCMS, [M + H]⁺ = 501.2; ¹H NMR (500 MHz, DMSO-d₆) δ 8.67 (d, J = 4.7 Hz,1H), 8.46 (s, 1H), 8.11 (s, 1H), 7.86 (d, J = 8.5 Hz, 1H), 7.79 (s, 2H),7.56- 7.47 (m, 2H), 7.44 (d, J = 8.7 Hz, 1H), 5.13 (s, 2H), 4.92 (s,1H), 4.14 (s, 3H), 2.40 (s, 3H), 2.25 (d, J = 7.3 Hz, 2H), 2.16 (d, J =5.3 Hz, 1H), 1.99 (dd, J = 13.9, 7.1 Hz, 2H), 1.72 (d, J = 10.7 Hz, 1H),1.61-1.51 (m, 1H), 1.26 (q, J = 9.9, 9.4 Hz, 1H); hLPA1 IC₅₀ = 579 nM.Example 29; Interme- diate 15+ Interme- diate 22-(trans-3-((2-methyl-6-(1-methyl-5- (((4-(pyridin-2-yl)pyrimidin-2-yl)amino)methyl)-1H-1,2,3-triazol-4-yl) pyridin-3-yl)oxy)cyclopentyl)aceticacid 39

  cis-3-(((6-(5-(((4-isopropylpyrimidin-2- LCMS, [M + H]⁺ = 465.9; ¹HNMR (500 MHz, DMSO-d₆) δ 8.23-8.11 (m, 1H), 7.85 (d, J = 8.5 Hz, 1H),7.48-7.37 (m, 2H), 6.53 (d, J = 5.1 Hz, 1H), 4.94 (d, J = 6.0 Hz, 2H),4.15 (s, 3H), 3.98 (d, J = 6.7 Hz, 2H), 2.78-2.59 (m, 2H), 2.45-2.35 (m,4H), 2.09 (dt, J = 15.0, 7.9 Hz, 1H), 1.82 (tq, J = 8.8, 5.5, 4.9 Hz,3H), 1.63-1.44 (m, 2H), 1.08 (d, J = 6.9 Hz, 6H); hLPA1 IC₅₀ = 164 nM.Examples 29/30; Inter- mediate 17 yl)amino)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3- yl)oxy)methyl)cyclopentane-1-carboxylic acid 40

LCMS, [M + H]⁺ = 466.1; ¹H NMR (500 MHz, DMSO-d₆) δ 8.17 (s, 1H), 7.83(d, J = 8.5 Hz, 1H), 7.41 (d, J = 8.8 Hz, 2H), 6.52 (d, J = 5.0 Hz, 1H),5.00-4.83 (m, 3H), 4.14 (s, 3H), 2.73-2.60 (m, 1H), 2.46-2.35 (m, 4H),2.31- 2.09 (m, 3H), 1.95 (s, 2H), 1.70 (s, 1H), 1.54 (s, 1H), 1.23 (brs, 1H), 1.08 (d, J = 6.9 Hz, 6H); hLPA1 IC₅₀ = 92 nM. Example 29; Inter-mediate 17+ Inter- mediate 2 2-(trans-3-((6-(5-(((4-isopropylpyrimidin-2-yl)amino)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2- methylpyridin-3-yl)oxy)cyclopentyl)acetic acid 41

LCMS, [M + H]⁺ = 457.1; ¹H NMR (500 MHz, DMSO-d₆) δ 7.73 (d, J = 8.6 Hz,2H), 7.13 (d, J = 8.6 Hz, 2H), 5.06 (s, 2H), 3.98 (d, J = 6.8 Hz, 2H),2.76 (quintet, J = 8.1 Hz, 1H), 2.68 (s, 3H), 2.45-2.36 (m, 1H), 2.32(s, 3H), 2.09 (dt, J = 13.0, 7.9 Hz, 1H), 1.82 (dd, J = 10.3, 6.0 Hz,2H), 1.71- 1.36 (m, 12H); hLPA1 IC₅₀ = 325 nM. Example 30; Interme-diate Example 3H Cis-3-((4-(4-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-3- methylisoxazol-5-yl)phenoxy)methyl)cyclopentane-1-carboxylic acid

Example 42.3-((6-(3-methyl-4-(((4-phenylpyrimidin-2-yl)amino)methyl)isoxazol-5-yl)pyridin-3-yl)oxy)cyclopentane-1-carboxylicAcid

A mixture of compound 29D (200 mg, 0.56 mmol), ethyl3-hydroxycyclopentane carboxylate (176 mg, 1.11 mmol), Et₃N (0.16 mL,1.11 mmol) and Ph₃P (292 mg, 1.11 mmol) in THE (5 mL) was cooled 0° C.and DIAD (0.22 mL, 1.11 mmol) was added. The reaction was stirred at RTovernight, then was concentrated in vacuo. The crude product waschromatographed (24 g SiO₂; continuous gradient from 0-50% EtOAc inhexanes for 30 min, then isocratic at 50% EtOAc for 10 min) to give theethyl ester product, which was used in the next step without furtherpurification.

LiOH.H₂O (187 mg, 4.46 mmol) was added to a solution of the above ethylester in THE (2 mL), water (1 mL) and MeOH (1 mL) at RT. The reactionwas stirred at RT overnight, then was concentrated in vacuo. The residuewas diluted with H₂O (5 mL), and the mixture was adjusted with aq. 1NHCl to pH ˜5 and extracted with EtOAc (3×15 mL). The combined organiclayers were washed with brine (2 mL), dried (MgSO₄) and concentrated invacuo to afford the crude product. This material was purified bypreparative LC/MS with the following conditions: Column: XBridge C18,19×200 mm, 5-μm particles; Mobile Phase A: 5:95 MeCN:H₂O with 10-mM aq.NH₄OAc; Mobile Phase B: 95:5 MeCN:H₂O with 10-mM aq. NH₄OAc; Gradient:15-55% B over 20 min, then a 5-min hold at 100% B; Flow: 20 mL/min.Fractions containing the desired product were combined and dried viacentrifugal evaporation. The title compound was obtained (18.8 mg, 7%yield) as an oil. LCMS, [M+H]⁺=472.2; ¹H NMR (500 MHz, DMSO-d₆) δ8.51-8.28 (m, 2H), 8.02-7.90 (m, 2H), 7.86 (br d, J=8.7 Hz, 1H),7.60-7.34 (m, 5H), 7.16 (br d, J=4.8 Hz, 1H), 5.11-5.04 (m, 1H),4.90-4.73 (m, 2H), 3.00-2.89 (m, 1H), 2.32 (s, 3H), 2.21-1.97 (m, 4H),1.87-1.75 (m, 2H); hLPA1 IC₅₀=26 nM.

Example 42 was further separated into individual isomers by chiralpreparative chromatography. Instrument: Berger MGII-SFC Prep-200(HPW-L2501); Columns: Chiralpak IC and Chiralpak ID, 21×250 mm, 5 m;Mobile Phase: 1st SFC: 45% MeOH w/0.1% DEA/55% CO2; Subsequentseparations: IC or ID with 45% MeOH/55% CO₂; Flow Conditions: 45 mL/min,110 Bar, 40° C.; Detector Wavelength: 220 nm; Injection Details: 1 mLinjections of 3.34 mg/mL solution in MeOH w/0.1% DEA.

Example 43 (cis isomer—first eluting enantiomer): LCMS, [M+H]⁺=472.0; ¹HNMR (500 MHz, DMSO-d₆) δ 8.39-8.36 (m, 1H), 8.32-8.26 (m, 1H), 7.95-7.77(m, 3H), 7.51-7.31 (m, 5H), 7.10 (br d, J=5.0 Hz, 1H), 4.96-4.89 (m,1H), 4.83-4.71 (m, 2H), 2.75-2.63 (m, 1H), 2.34-2.18 (m, 5H), 1.96-1.76(m, 4H); hLPA1 IC₅₀=50 nM.

Example 44 (cis isomer—second eluting enantiomer): LCMS, [M+H]⁺=472.0;¹H NMR (500 MHz, DMSO-d₆) δ 8.41 (br d, J=2.1 Hz, 1H), 8.35-8.29 (m,1H), 7.97-7.87 (m, 2H), 7.85 (d, J=8.7 Hz, 1H), 7.55-7.34 (m, 5H), 7.14(br d, J=5.0 Hz, 1H), 5.01-4.95 (m, 1H), 4.88-4.73 (m, 2H), 2.87-2.76(m, 1H), 2.42-2.22 (m, 5H), 2.02-1.89 (m, 4H); hLPA1 IC₅₀=158 nM.

Example 45 (trans isomer—first eluting enantiomer): LCMS, [M+H]⁺=472.1;¹H NMR (500 MHz, DMSO-d₆) δ 8.43 (d, J=2.5 Hz, 1H), 8.35-8.29 (m, 1H),7.97-7.88 (m, 2H), 7.85 (d, J=8.8 Hz, 1H), 7.58-7.52 (m, 1H), 7.49-7.32(m, 4H), 7.14 (d, J=5.0 Hz, 1H), 5.08-5.02 (m, 1H), 4.89-4.73 (m, 2H),2.99-2.89 (m, 1H), 2.31 (s, 3H), 2.20-1.99 (m, 4H), 1.85-1.74 (m, 2H);hLPA1 IC₅₀=17 nM.

Example 46 (trans isomer—second eluting enantiomer): LCMS, [M+H]⁺=471.9;H NMR (500 MHz, DMSO-d₆) δ 8.43 (d, J=2.3 Hz, 1H), 8.36-8.26 (m, 1H),7.98-7.81 (m, 3H), 7.58-7.32 (m, 5H), 7.14 (br d, J=5.0 Hz, 1H),5.09-5.02 (m, 1H), 4.91-4.73 (m, 2H), 3.00-2.86 (m, 1H), 2.31 (s, 3H),2.20-1.98 (m, 4H), 1.85-1.73 (m, 2H); hLPA1 IC₅₀=56 nM.

The examples in the following table were synthesized according to themethods and procedures described for the synthesis of Examples 3-10(using Intermediates 1-12).

Ex # Structure & Name Analytical & Biology Data Method 47

LCMS, (M + H)⁺ = 472; ¹H NMR (500 MHz, DMSO-d₆) δ 7.70 (br d, J = 6.7Hz, 1H), 7.44 (br d, J = 7.9 Hz, 1H), 5.34 (br s, 2H), 4.93 (br s, 1H),2.64 (br s, 3H), 2.37 (br s, 3H), 2.35-2.32 (m, 3H), 2.29 (br s, 4H),2.00-1.77 (m, 3H), 1.65-1.52 (m, 4H), 1.42 (br s, 6H); hLPA₁ IC₅₀ = 25nM. Example 8 (±)-cis-2-[3-({6-[4-({[cyclopentyl(methyl)carbamoyl]oxy}methyl)-3- methyl-1,2-oxazol-5-yl]-2-methyl-pyridin-3-yl}oxy)cyclopentyl]acetic acid 48

LCMS, (M + H)⁺ = 472; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (br d, J = 8.4Hz, 1H), 7.39 (br d, J = 8.6 Hz, 1H), 5.65-5.56 (m, 2H), 4.87 (br s,1H), 4.12-4.04 (m, 3H), 3.26- 3.04 (m, 2H), 2.76-2.68 (m, 3H), 2.35 (brs, 3H), 2.34-2.24 (m, 4H), 1.98- 1.50 (m, 8H), 1.47-1.34 (m, 3H); hLPA₁IC₅₀ = 40 nM. Example 6 (±)-cis-2-[3-({6-[5-({[(cyclobutyl-methyl)(methyl)carbamoyl]oxy}methyl)- 1-methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclopentyl] acetic acid 49

LCMS, (M + H)⁺ = 472; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (br d, J = 8.4Hz, 1H), 7.39 (br d, J = 8.6 Hz, 1H), 5.66-5.57 (m, 2H), 4.90 (br s,1H), 4.12-4.05 (m, 3H), 3.25- 3.05 (m, 2H), 2.78-2.68 (m, 3H), 2.44-2.38(m, 1H), 2.35 (br s, 3H), 2.31- 2.26 (m, 2H), 2.18-2.10 (m, 1H),2.01-1.89 (m, 3H), 1.85-1.40 (m, 8H), 1.30-1.19 (m, 1H); hLPA₁ IC₅₀ = 13nM. Example 6 (±)-trans-2-[3-({6-[5-({[(cyclobutyl-methyl)(methyl)carbamoyl]oxy}methyl)- 1-methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclopentyl] acetic acid 50

LCMS, (M + H)⁺ = 486. ¹H NMR (500 MHz, DMSO-d₆) δ 7.69 (d, J = 8.4 Hz,1H), 7.43 (d, J = 8.7 Hz, 1H), 5.32 (s, 2H), 4.94 (br s, 1H), 2.62 (brs, 3H), 2.35 (s, 3H), 2.28 (s, 3H), 2.21 (m, 2H), 2.12 (m, 1H),1.95-1.82 (m, 2H), 1.73-1.66 (m, 1H), 1.62-1.27 (m, 10H), 1.05 (br d, J= 5.9 Hz, 3H) hLPA₁ IC₅₀ = 20 nM Example 8(±)-trans-2-[3-({6-[4-({[cyclopentyl (methyl)carbamoyl]oxy}methyl)-3-methyl-1,2-oxazol-5-yl]-2-methyl- pyridin-3-yl}oxy)cyclopentyl]propanoicacid; first eluting isomer from diastereomeric mixture separated bypreparative HPLC: XBridge C18 column, 19 x 200 mm, 5-μm particles;Mobile Phase A: 5:95 MeCN:H₂O with 0.1% TFA; Mobile Phase B: 95:5MeCN:H₂O with 0.1% TFA; Gradient: 35-80% B over 25 min, then a 5-minhold at 100% B; Flow: 20 mL/min 51

LCMS, (M + H)⁺ = 485.9; ¹H NMR (500 MHz, DMSO-d₆) δ 7.68 (br d, J = 8.5Hz, 1H), 7.41 (br d, J = 8.7 Hz, 1H), 5.30 (s, 2H), 4.92 (br s, 1H),2.61 (br s, 3H), 2.34 (s, 3H), 2.27 (s, 3H), 2.22-2.11 (m, 3H),1.94-1.80 (m, 2H), 1.74-1.64 (m, 1H), 1.63-1.22 (m, 10H), 1.07 (br d, J= 5.7 Hz, 3H); hLPA₁ IC₅₀ = 24 nM. Example 8(±)-trans-2-[3-({6-[4-({[cyclopentyl (methyl)carbamoyl]oxy}methyl)-3-methyl-1,2-oxazol-5-yl]-2-methyl- pyridin-3-yl}oxy)cyclopentyl]propanoicacid; second eluting isomer from diastereomeric mixture separated bypreparative HPLC: XBridge C18 column, 19 x 200 mm, 5-μm particles;Mobile Phase A: 5:95 MeCN:H₂O with 0.1% TFA; Mobile Phase B: 95:5MeCN:H₂O with 0.1% TFA; Gradient: 35-80% B over 25 min, then a 5-minhold at 100% B; Flow: 20 mL/min 52

LCMS, (M + H)⁺ = 500; ¹H NMR (500 MHz, DMSO-d₆) δ 7.69 (br d, J = 8.5Hz, 1H), 7.44 (br d, J = 8.6 Hz, 1H), 5.32 (s, 2H), 4.92 (br s, 1H),2.62 (br s, 3H), 2.42-2.37 (m, 1H), 2.36 (s, 3H), 2.28 (s, 3H),2.11-2.01 (m, 1H), 1.80-1.66 (m, 4H), 1.63- 1.35 (m, 9H), 1.06 (br d, J= 4.9 Hz, 6H); hLPA₁ IC₅₀ = 8.0 nM. Example 8(±)-trans-2-[3-({6-[4-({[cyclopentyl (methyl)carbamoyl]oxy}methyl)-3-methyl-1,2-oxazol-5-yl]-2-methyl- pyridin-3-yl}oxy)cyclopentyl]-2-methylpropanoic acid 53

LCMS, (M + H)⁺ = 498; ¹H NMR (500 MHz, DMSO-d₆) δ 7.80 (br d, J = 8.5Hz, 1H), 7.37 (br d, J = 8.5 Hz, 1H), 5.64-5.54 (m, 2H), 4.86 (br s,1H), 4.07 (br s, 3H), 2.78-2.64 (m, 3H), 2.35 (s, 3H), 2.30- 2.22 (m,1H), 2.18-2.07 (m, 1H), 1.97-1.37 (m, 11H), 1.27-1.18 (m, 1H), 0.98 (brs, 2H), 0.74 (br s, 2H); hLPA₁ IC₅₀ = 14 nM. Example 6(±)-trans-1-[3-({6-[5-({[(cyclobutyl- methyl)(methyl)carbamoyl]oxy}methyl)-1-methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclo-pentyl] cyclopropane-1-carboxylic acid 54

LCMS, (M + H)⁺ = 446; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (br d, J = 7.3Hz, 1H), 7.40 (br d, J = 8.3 Hz, 1H), 5.62 (m, 2H), 4.91 (br s, 1H),4.08 (s, 3H), 2.80-2.69 (m, 3H), 2.42 (m, 1H), 2.35 (s, 3H), 2.29 (br d,J = 7.2 Hz, 2H), 2.14 (m, 1H), 1.97 (m, 2H), 1.70 (m, 1H), 1.54 (m, 1H),1.47 (m, 1H), 1.34-1.20 (m, 2H), 0.84-0.57 (m, 3H); hLPA₁ IC₅₀ = 292 nM.Example 4 (±)-trans-2-[3-({2-methyl-6-[1-methyl-5-({[methyl(propyl)carba-moyl] oxy}methyl)-1H-1,2,3-triazol-4-yl]pyridin-3-yl}oxy)cyclopentyl]acetic acid 55

LCMS, (M + H)⁺ = 460; ¹H NMR (500 MHz, DMSO-d₆) δ 7.86-7.78 (m, 1H),7.43-7.35 (m, 1H), 5.62 (m, 2H), 4.90 (br s, 1H), 4.12-4.06 (m, 3H),3.05-2.85 (m, 2H), 2.76 (m, 3H), 2.43 (m, 1H), 2.38-2.32 (m, 3H), 2.27(m, 2H), 2.14 (m, 1H), 1.97 (m, 2H), 1.75- 1.50 (m, 3H), 1.25 (m, 1H),0.80 (br s, 3H), 0.62 (br s, 3H); hLPA₁ IC₅₀ = 135 nM. Example 4(±)-trans-2-[3-({2-methyl-6-[1-methyl-5- ({[methyl(2-methylpropyl)carbamoyl] oxy}methyl)-1H-1,2,3-triazol-4-yl]pyridin-3-yl}oxy)cyclo-pentyl]acetic acid 56

LCMS, (M + H)⁺ = 472.4; ¹H NMR (500 MHz, DMSO-d₆) δ 7.81 (br d, J = 8.5Hz, 1H), 7.38 (br d, J = 8.5 Hz, 1H), 5.62 (br s, 2H), 4.90 (br s, 1H),4.08 (s, 3H), 2.64 (br s, 3H), 2.42 (m, 1H), 2.34 (s, 3H), 2.26 (br d, J= 6.7 Hz, 2H), 2.13 (m, 1H), 1.97 (m, 2H), 1.74-1.38 (m, 10H), 1.24 (m,1H); hLPA₁ IC₅₀ = 89 nM. Example 4 (±)-trans-2-[3-({6-[5-({[cyclopentyl(methyl)carbamoyl]oxy}methyl)-1- methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclopentyl] acetic acid 57

LCMS, (M + H)⁺ = 458.3; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (d, J = 8.5 Hz,1H), 7.39 (d, J = 8.5 Hz, 1H), 5.63 (s, 2H), 4.91 (br s, 1H), 4.15- 4.05(m, 3H), 2.73 (m, 3H), 2.43 (m, 1H), 2.35 (s, 3H), 2.29 (br d, J = 7.3Hz, 2H), 2.14 (m, 1H), 1.97 (m, 2H), 1.69 (m, 1H), 1.53 (m, 1H),1.28-0.98 (m, 4H), 0.77-0.42 (m, 4H); hLPA₁ IC₅₀ = 295 nM. Example 10(±)-trans-2-[3-({2-methyl-6-[1-methyl-5- ({[methyl(1-methylcyclo-propyl)carbamoyl]oxy}methyl)-1H-1,2,3-triazol-4-yl]pyridin-3-yl}oxy)cyclopentyl]acetic acid 58

LCMS, (M + H)⁺ = 472; ¹H NMR (500 MHz, DMSO-d₆) δ 7.81 (br d, J = 8.5Hz, 1H), 7.38 (br d, J = 8.5 Hz, 1H), 5.61 (s, 2H), 4.90 (br s, 1H),4.15- 4.05 (m, 3H), 2.79-2.70 (m, 3H), 2.42 (m, 1H), 2.35 (s, 3H), 2.25(br d, J = 7.3 Hz, 2H), 2.14 (m, 1H), 1.96 (m, 2H), 1.69 (m, 1H), 1.53(m, 2H), 1.36-1.19 (m, 2H), 0.82 (m, 1H), 0.76-0.58 (m, 5H), 0.47 (m,1H); hLPA₁ IC₅₀ = 479 nM. Example 10(±)-trans-2-[3-({6-[5-({[(1-ethylcyclo-propyl)(methyl)carbamoyl]oxy}methyl)- 1-methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclo- pentyl]acetic acid 59

  (±)-trans-2-[3-[(2-methyl-6-{1-methyl-5- LCMS (M + H)⁺ = 458; ¹H NMR(500 MHz, DMSO-d₆) δ 7.80 (d, J = 8.6 Hz, 1H), 7.62 (br s, H), 7.39 (d,J = 8.7 Hz, 1H), 4.90 (br s, 1H), 4.70 (br d, J = 4.5 Hz, 2H), 4.04 (s,3H), 3.91-3.68 (m, 2H), 2.42 (m, 1H), 2.37 (s, 3H), 2.29 (br d, J = 7.2Hz, 2H), 2.15 (m, 1H), 1.95 (m, 2H), 1.70 (m, 1H), 1.53 (m, 1H), 1.24(m, 1H), 0.99 (br s, 3H), 0.79 (m, 1H), 0.42-0.10 (m, 4H); hLPA₁ IC₅₀ =276 nM. Example 9 [({[(1-methylcyclopropyl)methoxy]carbonyl}amino)methyl]-1H-1,2,3- triazol-4-yl}pyridin-3-yl)oxy]cyclo-pentyl]acetic acid 60

LCMS, (M + H)⁺ = 472; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (d, J = 8.2 Hz,1H), 7.59 (br s, 1H), 7.40 (d, J = 8.5 Hz, 1H), 4.91 (br s, 1H), 4.74(br s, 2H), 4.04 (s, 3H), 3.80 (br s, 1H), 2.42 (m, 1H), 2.39 (s, 3H),2.28 (br d, J = 7.3 Hz, 2H), 2.15 (m, 1H), 1.97 (m, 2H), 1.71 (m, 1H),1.55 (m, 1H), 1.26 (m, 3H), 0.82 (br s, 3H), 0.41-0.20 (m, 4H); hLPA₁IC₅₀ = 264 nM. Example 9 (±)-trans-2-[3-[(6-{5-[({[(1-ethyl-cyclopropyl)methoxy]carbonyl} amino)methyl]-1-methyl-1H-1,2,3-triazol-4-yl}-2-methylpyridin-3-yl) oxy]cyclopentyl]acetic acid 61

LCMS, (M + H)⁺ = 483.9; ¹H NMR (500 MHz, DMSO-d₆) δ 7.81 (br d, J = 8.2Hz, 1H), 7.39 (d, J = 8.5 Hz, 1H), 5.62 (br d, J = 5.8 Hz, 2H), 4.90 (brs, 1H), 4.08 (m, 3H), 3.22- 3.07 (m, 4H), 2.41 (m, 1H), 2.34 (s, 3H),2.29 (d, J = 7.3 Hz, 2H), 2.14 (m, 1H), 1.95 (m, 3H), 1.80 (m, 6H),1.74-1.66 (m, 2H), 1.55 (m, 1H), 1.30- 1.21 (m, 1H); hLPA₁ IC₅₀ = 444nM. Example 4 (±)-trans-2-[3-({6-[5-({6-azaspiro[3.4]octane-6-carbonyloxy}methyl)-1-methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3- yl}oxy)cyclopentyl]acetic acid62

LCMS, (M + H)⁺ = 500; ¹H NMR (500 MHz, DMSO-d₆) δ 7.81 (d, J = 8.5 Hz,1H), 7.62 (br s, 1H), 7.40 (d, J = 8.5 Hz, 1H), 4.90 (br s, 1H), 4.70(br s, 2H), 4.03 (s, 3H), 3.88 (br s, 1H), 2.42 (m, 1H), 2.37 (s, 3H),2.29 (br d, J = 7.3 Hz, 2H), 2.14 (m, 1H), 1.96 (m, 2H), 1.80- 1.49 (m,8H), 1.37-1.06 (m, 5H), 0.78 (m, 3H); hLPA₁ IC₅₀ = 183 nM. Example 9(±)-trans-2-[3-[(2-methyl-6-{1-methyl-5-[({[(1-propylcyclobutyl)methoxy] carbonyl}amino)methyl]-1H-1,2,3-triazol-4-yl}pyridin-3-yl)oxy]cyclo- pentyl]acetic acid 63

LCMS, (M + H)⁺ = 458.4; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (d, J = 8.5 Hz,1H), 7.39 (d, J = 8.5 Hz, 1H), 5.61 (s, 2H), 4.91 (br s, 1H), 4.08 (s,3H), 2.73 (br s, 3H), 2.42 (m, 1H), 2.34 (s, 3H), 2.30 (br d, J = 7.3Hz, 2H), 2.15 (m, 1H), 2.09-1.80 (m, 6H), 1.70 (m, 1H), 1.60-1.46 (m,3H), 1.26 (m, 1H); hLPA₁ IC₅₀ = 96 nM. Example 4(±)-trans-2-[3-({6-[5-({[cyclobutyl methyl-1H-1,2,3-triazol-4-yl]-2-(methyl)carbamoyl]oxy}methyl)-1- methylpyridin-3-yl}oxy)cyclopentyl]acetic acid 64

LCMS, (M + H)⁺ = 478.2; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (d, J = 8.5 Hz,1H), 7.39 (br d, J = 8.5 Hz, 1H), 5.63 (br d, J = 12.8 Hz, 2H), 4.91 (brs, 1H), 4.51-4.13 (m, 2H), 4.08 (s, 3H), 2.81-2.71 (m, 3H), 2.43 (m,1H), 2.35 (s, 3H), 2.29 (br d, J = 7.3 Hz, 2H), 2.15 (m, 1H), 1.97 (m,2H), 1.70 (m, 1H), 1.55 (m, 3H), 1.46-1.34 (m, 2H), 1.29- 1.21 (m, 3H);hLPA₁ IC₅₀ = 165 nM. Example 4 (±)-trans-2-[3-({6-[5-({[(4-fluoro-butyl)(methyl)carbamoyl]oxy}methyl)-1- methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclo-pentyl] acetic acid 65

LCMS, (M + H)⁺ = 464; ¹H NMR (500 MHz, DMSO-d₆) δ 7.82 (br d, J = 8.5Hz, 1H), 7.39 (br d, J = 8.5 Hz, 1H), 5.63 (m, 2H), 4.90 (br s, 1H),4.50- 4.21 (m, 2H), 4.08 (s, 3H), 2.84-2.72 (m, 3H), 2.42 (m, 1H), 2.35(s, 3H), 2.28 (br d, J = 7.3 Hz, 2H), 2.15 (m, 1H), 1.97 (m, 2H),1.89-1.77 (m, 1H), 1.70 (m, 2H), 1.53 (m, 1H), 1.29-1.20 (m, 3H); hLPA₁IC₅₀ = 944 nM. Example 4 (±)-trans-2-[3-({6-[5-({[(3-fluoro-propyl)(methyl)carbamoyl]oxy}methyl)- 1-methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclo-pentyl] acetic acid 66

LCMS, (M + H)⁺ = 470.2; ¹H NMR (500 MHz, DMSO-d₆) δ 7.83 (d, J = 8.6 Hz,1H), 7.41 (d, J = 8.7 Hz, 1H), 5.62 (s, 2H), 4.92 (br s, 1H), 4.07 (s,3H), 3.92-3.76 (m, 4H), 2.43 (m, 1H), 2.36 (s, 3H), 2.31 (d, J = 7.2 Hz,2H), 2.22-2.11 (m, 1H), 2.16 (m, 4H), 2.00 (m, 2H), 1.72 (m, 3H), 1.56(m, 1H), 1.27 (m, 1H); hLPA₁ IC₅₀ = 452 nM. Example 4(±)-trans-2-[3-({6-[5-({2-azaspiro[3.3] heptane-2-carbonyloxy}methyl)-1-methyl-1H-1,2,3-triazol-4-yl]-2- methylpyridin-3-yl}oxy)cyclopentyl]acetic acid 67

LCMS, (M + H)⁺ = 470.2; ¹H NMR (500 MHz, DMSO-d₆) δ 7.87-7.80 (m, 1H),7.42 (br d, J = 8.3 Hz, 1H), 5.67 (br d, J = 7.1 Hz, 2H), 4.93 (br s,1H), 4.13-4.06 (m, 3H), 3.22- 3.05 (m, 2H), 2.44 (m, 1H), 2.37 (s, 3H),2.32 (br d, J = 7.2 Hz, 2H), 2.16 (m, 1H), 1.98 (m, 2H), 1.72 (m, 3H),1.56 (m, 1H), 1.27 (m, 1H), 0.60-0.46 (m, 4H); hLPA₁ IC₅₀ = 770 nM.Example 4 (±)-trans-2-[3-({6-[5-({5-azaspiro[2.4]heptane-5-carbonyloxy}methyl)-1- methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclopentyl] acetic acid 68

LCMS, (M + H)⁺ = 478.4; ¹H NMR (500 MHz, DMSO-d₆) δ 7.44 (br d, J = 11.9Hz, 1H), 5.40 (s, 2H), 4.95 (br s, 1H), 4.10 (s, 3H), 3.18-2.94 (m, 2H),2.80-2.62 (m, 3H), 2.42 (m, 1H), 2.35-2.25 (m, 5H), 2.17 (m, 1H), 1.96(m, 2H), 1.71 (m, 1H), 1.57 (m, 1H), 1.38 (m, 1H), 1.31-1.12 (m, 3H),1.02 (m, 1H), 0.87- 0.66 (m, 3H); hLPA₁ IC₅₀ = 147 nM Example 4(±)-trans-2-[3-({6-[5-({[butyl(methyl)carbamoyl]oxy}methyl)-1-methyl-1H-1,2,3-triazol-4-yl]-5-fluoro-2-methyl-pyridin-3-yl}oxy)cyclopentyl]acetic acid 69

LCMS, (M + H)⁺ = 490.1; ¹H NMR (500 MHz, DMSO-d₆) δ 7.44 (br d, J = 11.9Hz, 1H), 5.39 (s, 2H), 4.95 (br s, 1H), 4.10 (s, 3H), 2.71-2.55 (m, 3H),2.42 (m, 1H), 2.34- 2.25 (m, 5H), 2.18 (m, 1H), 1.98 (m, 2H), 1.72 (m,1H), 1.65-1.33 (m, 9H), 1.26 (m, 1H); hLPA₁ IC₅₀ = 210 nM. Example 4(±)-trans-2-[3-({6-[5-({[cyclopentyl (methyl)carbamoyl]oxy}methyl)-1-methyl-1H-1,2,3-triazol-4-yl]-5-fluoro-2- methylpyridin-3-yl}oxy)cyclopentyl] acetic acid 70

LCMS, (M + H)⁺ = 490.4; ¹H NMR (500 MHz, DMSO-d₆) δ 7.44 (br d, J = 11.9Hz, 1H), 5.39 (s, 2H), 4.94 (br s, 1H), 4.10 (br s, 3H), 3.22-2.97 (m,2H), 2.78-2.61 (m, 3H), 2.41 (m, 1H), 2.35-2.25 (m, 5H), 2.17 (m, 1H),2.02-1.85 (m, 3H), 1.82- 1.51 (m, 6H), 1.42 (m, 1H), 1.25 (m, 1H); hLPA₁IC₅₀ = 220 nM. Example 4 (±)-trans-2-[3-({6-[5-({[(cyclobutyl-methyl)(methyl)carbamoyl]oxy} methyl)-1-methyl-1H-1,2,3-triazol-4-yl]-5-fluoro-2-methyl-pyridin-3-yl} oxy)cyclopentyl]acetic acid 71

LC-MS, [M + H]⁺ = 443; ¹H NMR (400 MHz, CD₃OD) δ 7.72 (d, J = 8.8 Hz,2H), 7.03 (d, J = 9.0 Hz, 2H), 5.12 (s, 2H), 4.91 (m, 1H), 4.42 (m, 1H),2.89 (m, 1H), 2.75 (s, 3H), 2.41 (m, 1H), 2.35 (s, 3H), 2.17-1.94 (m,5H), 1.80- 1.47 (m, 8H). hLPA₁ IC₅₀ = 205 nM. Example 3(±)-cis-3-{4-[4-({[cyclopentyl(methyl)carbamoyl]oxy}methyl)-3-methyl-1,2- oxazol-5-yl]phenoxy}cyclopentane-1-carboxylic acid 72

LCMS, (M + H)⁺ = 445.1; ¹H NMR (500 MHz, DMSO-d₆) δ 7.73 (br s, 2H),7.09 (br d, J = 7.6 Hz, 2H), 5.06 (br s, 2H), 4.99 (m, 1H), 3.17 (m,2H), 2.92 (m, 1H), 2.79 (m, 3H), 2.32 (s, 3H), 2.20- 1.98 (m, 3H), 1.79(m, 2H), 1.54-1.20 (m, 4H), 0.87 (br s, 3H), 0.75 (br s, 3H); hLPA₁ IC₅₀= 254 nM. Example 3 (±)-trans-3-{4-[3-methyl-4-({[methyl(3-methylbutyl)carbamoyl]oxy}methyl)-1,2-oxazol-5-yl]phenoxy}cyclopentane-1- carboxylic acid 73

LCMS, (M + H)⁺ = 445; ¹H NMR (500 MHz, DMSO-d₆) δ 7.73 (br s, 2H), 7.08(br d, J = 7.9 Hz, 2H), 5.06 (br s, 2H), 4.92 (m, 1H), 3.19 (m, 2H),2.87-2.74 (m, 4H), 2.39 (m, 1H), 2.32 (s, 3H), 2.00- 1.82 (m, 5H),1.54-1.18 (m, 3H), 0.87 (br s, 3H), 0.75 (br s, 3H); hLPA₁ IC₅₀ = 1180nM. Example 3 (±)-cis-3-{4-[3-methyl-4-({[methyl(3-methylbutyl)carbamoyl]oxy}methyl)-1,2-oxazol-5-yl]phenoxy}cyclo-pentane-1- carboxylic acid 74

LCMS, (M + H)⁺ = 458; ¹H NMR (500 MHz, DMSO-d₆) δ 7.81 (d, J = 8.5 Hz,1H), 7.40 (d, J = 8.6 Hz, 1H), 5.60 (br d, J = 14.1 Hz, 2H), 4.90 (m,1H), 4.08 (br s, 3H), 3.50 (m, 1H), 3.25-3.06 (m, 2H), 2.83 (m, 1H),2.77- 2.67 (m, 3H), 2.32 (br s, 3H), 2.26 (m, 1H), 2.04- 1.38 (m, 11H);hLPA₁ IC₅₀ = 101 nM. Example 6 (±)-cis-3-({6-[5-({[cyclobutylmethyl)(methyl)carbamoyl]oxy}methyl)-1- methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclopentane-1- carboxylic acid 75

LCMS, (M + H)⁺ = 458; ¹H NMR (500 MHz, DMSO-d₆) δ 7.80 (d, J = 8.5 Hz,1H), 7.40 (d, J = 8.6 Hz, 1H), 5.58 (br d, J = 16.8 Hz, 2H), 4.95 (m,1H), 4.07 (br s, 2H), 3.71 (m, 1H), 3.23-3.02 (m, 2H), 2.93 (m, 1H),2.75- 2.65 (m, 3H), 2.34 (s, 3H), 2.25 (m, 1H), 2.04 (m, 4H), 1.90 (m,1H), 1.83- 1.35 (m; 7H); hLPA₁ IC₅₀ = 42.5 nM. Example 6(±)-trans-3-({6-[5-({[(cyclobutyl-methyl)(methyl)carbamoyl]oxy}methyl)-1- methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclo-pentane-1- carboxylic acid 76

LCMS, (M + H)⁺ = 458; ¹H NMR (500 MHz, DMSO-d₆) δ 7.71 (d, J = 8.6 Hz,1H), 7.47 (d, J = 8.7 Hz, 1H), 5.34 (br s, 2H), 4.97 (m, 1H), 2.86 (m,1H), 2.64 (br s, 3H), 2.34 (s, 3H), 2.30 (s, 3H), 2.06-1.82 (m, 5H),1.66- 1.33 (m, 8H); hLPA₁ IC₅₀ = 40 nM. Example 8(±)-cis-3-({6-[4-({[cyclopentyl(methyl)carbamoyl]oxy}methyl)-3-methyl-1,2- oxazol-5-yl]-2-methyl-pyridin-3-yl}oxy)cyclopentane-1-carboxylic acid 77

LCMS, (M + H)⁺ = 458; ¹H NMR (500 MHz, DMSO-d₆) δ 7.71 (d, J = 8.4 Hz,1H), 7.48 (br d, J = 8.6 Hz, 1H), 5.34 (s, 2H), 5.03 (m, 1H), 2.94 (m,1H), 2.64 (br s, 3H), 2.37 (s, 3H), 2.30 (s, 3H), 2.16-1.99 (m, 4H),1.80 (m, 2H), 1.63-1.36 (m, 8H); hLPA₁ IC₅₀ = 66 nM. Example 8(±)-trans-3-({6-[4-({[cyclopentyl(methyl)carbamoyl]oxy}methyl)-3-methyl-1,2- oxazol-5-yl]-2-methyl-pyridin-3-yl}oxy)cyclopentane-1-carboxylic acid 78

LCMS, (M + H)⁺ = 458; ¹H NMR (500 MHz, CDCl₃) δ 7.92 (br d, J = 7.7 Hz,1H), 7.13 (br d, J = 8.3 Hz, 1H), 5.74 (br d, J = 9.4 Hz, 2H), 4.89 (brs, 1H), 4.14 (br d, J = 7.2 Hz, 3H), 3.35-3.11 (m, 3H), 2.92- 2.75 (m,3H), 2.44 (s, 3H), 2.26-1.50 (m, 13H); hLPA₁ IC₅₀ = 28 nM Absolutestereochemistry not determined Example 6Trans-(1,3)-3-({6-[5-({[(cyclobutyl-methyl)(methyl)carbamoyl]oxy}methyl)- 1-methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclopentane-1- carboxylic acid; first elutingenantiomer from chiral SFC separation: Column: Chiralpak OJ-H, 21 x 250mm, 5 μm. Mobile Phase: 10% MeOH/90% CO₂. Flow Conditions: 45 mL/min,110 Bar, 40° C. 79

LCMS, (M + H)⁺ = 458; ¹H NMR (500 MHz, CDCl₃) δ 7.87 (br s, 1H), 7.09(br d, J = 5.8 Hz, 1H), 5.72 (br s, 2H), 4.84 (br s, 1H), 4.13 (br d, J= 7.2 Hz, 3H), 3.35-3.08 (m, 3H), 2.90-2.75 (m, 3H), 2.41 (br s, 3H),2.24-1.50 (m, 13H); hLPA₁ IC₅₀ = 670 nM Absolute stereochemistry notdetermined Example 6 Trans-(1,3)-3-({6-[5-({[(cyclobutyl- methyl)(methyl)carbamoyl]oxy} methyl)-1-methyl-1H-1,2,3-triazol-4-yl]-2-methylpyridin-3-yl}oxy)cyclo-pentane- 1-carboxylic acid; secondeluting enantiomer from chiral SFC separation: Column: Chiralpak OJ-H,21 x 250 mm, 5 μm. Mobile Phase: 10% MeOH/90% CO₂. Flow Conditions: 45mL/min, 110 Bar, 40° C.

Example 80.(±)-2-(3-((6-(5-(((5-(2-cyclobutylethyl)-1,2,4-oxadiazol-3-yl)amino)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)aceticAcid

80A. (±)-Trans-isopropyl2-(3-((6-(5-formyl-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetate

To a solution of compound 4B (300 mg, 0.77 mmol) in CH₂Cl₂ (7.5 mL) wasadded NaHCO₃ (324 mg, 3.86 mmol) and Dess-Martin periodinane (393 mg,0.93 mmol). The reaction was stirred at RT for 1 h, after which thewhite solids were filtered through Celite, which was rinsed with EtOAc.The combined filtrates were concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 10%-75% EtOAc/hexanes)to give the title compound (280 mg, 94% yield) as a white solid. LCMS,[M+H]⁺=387; ¹H NMR (500 MHz, CDCl₃) δ 10.95 (s, 1H), 8.07 (d, J=8.5 Hz,1H), 7.14 (d, J=8.5 Hz, 1H), 5.03 (m, 1H), 4.85 (m, 1H), 4.36 (s, 3H),2.63 (m, 1H), 2.46 (s, 3H), 2.36 (d, J=7.2 Hz, 2H), 2.23-2.08 (m, 3H),1.90 (m, 1H), 1.59 (m, 1H), 1.35 (m, 1H), 1.24 (dd, J=6.2, 2.1 Hz, 6H).

Example 80

To a solution of compound 80A (30 mg, 0.078 mmol) and Intermediate 18(26 mg, 0.155 mmol) in DCE (1 mL) was added HOAc (9 μL, 0.016 mmol, 10%in DCE). The reaction was stirred 30 min at RT and added NaBH(OAc)₃ (49mg, 0.23 mmol). The reaction mixture was stirred overnight, quenchedwith satd aq. NaHCO₃, stirred for 15 min and extracted with EtOAc (2×).The combined organic extracts were washed with brine, dried (MgSO₄), andconcentrated in vacuo. The residue was taken up in MeOH and THE (0.75 mLeach) and aq. 2M LiOH (0.75 mL, 1.5 mmol) was added. The reaction washeated at 50° C. for 1 h, then was cooled to RT, diluted with H₂O,neutralized with 1N aq. HCl, treated with pH 6 aq. phosphate buffer andextracted with EtOAc (2×). The combined organic extracts were washedwith H₂O, brine, dried (MgSO₄), and concentrated in vacuo. The residuewas purified by preparative LC/MS using the following conditions:Column: XBridge C18, 200 mm×19 mm, 5-μm particles; Mobile Phase A: 5:95acetonitrile: water with 0.1% TFA; Mobile Phase B: 95:5 acetonitrile:water with 0.1% TFA; Gradient: a 0-min hold at 27% B, 27-67% B over 20min, then a 4-min hold at 100% B; Flow Rate: 20 mL/min; to give thetitle compound (22 mg, 56% yield). LC-MS, [M+H]⁺=496; ¹H NMR (500 MHz,DMSO-d₆) δ 7.84 (d, J=8.5 Hz, 1H), 7.42 (d, J=8.5 Hz, 1H), 7.21 (br t,J=5.5 Hz, 1H), 4.93 (m, 1H), 4.77 (br d, J=5.5 Hz, 2H), 4.09 (s, 3H),2.60 (br t, J=7.5 Hz, 2H), 2.43 (m, 1H), 2.38 (s, 3H), 2.30 (br d, J=7.0Hz, 2H), 2.22 (m, 1H), 2.15 (m, 1H), 2.03-1.92 (m, 4H), 1.82-1.67 (m,5H), 1.61-1.50 (m, 3H), 1.26 (m, 1H); hLPA₁ IC₅₀=108 nM.

Example 81.(±)-Trans-2-(3-((6-(5-((isobutoxycarbonyl)amino)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)aceticAcid

81A.(±)-Trans-4-(5-((3-(2-isopropoxy-2-oxoethyl)cyclopentyl)oxy)-6-methylpyridin-2-yl)-1-methyl-1H-1,2,3-triazole-5-carboxylicAcid

To a mixture of compound 80A (150 mg, 0.39 mmol), NaH₂PO₄ (233 mg, 1.94mmol), 2-methyl-2-butene, (1.55 mL of a 2.OM solution in THF; 3.11mmol), H₂O (0.4 mL), and t-BuOH (2 mL) at RT was added NaClO₂ (70 mg,0.78 mmol). The reaction mixture was stirred at RT overnight, then waspoured into water and extracted with EtOAc (2×). The combined organicextracts were dried (MgSO₄) and concentrated in vacuo to give the titlecompound (140 mg, 90% yield). LC-MS, [M+H]⁺=403; ¹H NMR (500 MHz, CDCl₃)δ 8.35 (d, J=8.8 Hz, 1H), 7.42 (d, J=8.8 Hz, 1H), 5.02 (m, 1H), 4.91 (m,1H), 4.45 (s, 3H), 2.61 (m, 1H), 2.55 (s, 3H), 2.37 (m, 2H), 2.29-2.07(m, 3H), 1.91 (m, 1H), 1.64 (m, 1H), 1.37 (m, 1H), 1.24 (dd, J=6.3, 1.9Hz, 6H).

81B. (±)-trans-isopropyl2-(3-((6-(5-((isobutoxycarbonyl)amino)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetate

A mixture of compound 81A (30 mg, 0.075 mmol), (PhO)₂PON₃ (96 μL, 0.447mmol), 2-methylpropan-1-ol (11 mg, 0.149 mmol), TEA (42 μL, 0.298 mmol)in THE (0.5 mL) was stirred at 65° C. for 2 h. The mixture was cooled toRT, diluted with satd aq. NaHCO₃ and extracted with EtOAc (2×). Thecombined organic extracts were washed with brine, dried (MgSO₄), andconcentrated in vacuo. The residue was chromatographed (SiO₂, continuousgradient from 25% to 100% EtOAc/hexanes) to afford the title compound(24 mg, 68% yield). LC-MS, [M+H]⁺=474.

Example 81

To a solution of compound 81B (24 mg, 0.051 mmol) in MeOH and THE (0.75mL each) was added aq. 2M LiOH (0.75 mL, 1.5 mmol). The reaction washeated at 50° C. for 30 min, then was cooled to RT, diluted with H₂O,neutralized with 1N aq. HCl, treated with pH 6 aq. phosphate buffer andextracted with EtOAc (2×). The combined organic extracts were washedwith H₂O, brine, dried (MgSO₄), and concentrated in vacuo.

The residue was purified via preparative LC/MS with the followingconditions: Column: XBridge C18, 200 mm×19 mm, 5-μm particles; MobilePhase A: 5:95 MeCN:H₂O with 10-mM aq. NH₄OAc; Mobile Phase B: 95:5MeCN:H₂O with 10-mM aq. NH₄OAc; Gradient: a 0-min hold at 20% B, 20-42%B over 25 min, then a 2-min hold at 100% B; Flow Rate: 20 mL/min; togive the title compound (13 mg, 57% yield). LC-MS, [M+H]⁺=432. ¹H NMR(500 MHz, DMSO-d₆) δ 7.73 (br d, J=8.5 Hz, 1H), 7.36 (br d, J=8.5 Hz,1H), 4.90 (m, 1H), 3.86 (s, 3H), 3.50-3.24 (m, 1H), 2.42 (m, 1H), 2.33(s, 3H), 2.27 (br d, J=7.3 Hz, 2H), 2.13 (m, 1H), 2.00-1.91 (m, 2H),1.89 (s, 1H), 1.69 (m, 1H), 1.54 (m, 1H), 1.24 (m, 1H), 0.83 (br s, 6H).hLPA₁ IC₅₀=613 nM.

The examples in the following table were synthesized according to themethods and procedures described for the synthesis of Examples 80 and81.

Ex # Structure & Name Analytical & Biology Data Method 82

LCMS, (M + H)⁺ = 468; ¹H NMR (500 MHz, DMSO-d₆) δ 7.84 (br d, J = 8.2Hz, 1H), 7.42 (br d, J = 8.5 Hz, 1H), 7.23 (m, 1H), 4.92 (m, 1H), 4.77(br d, J = 5.2 Hz, 2H), 4.10 (s, 3H), 2.64 (br d, J = 7.0 Hz, 2H), 2.43(m, 1H), 2.38 (br s, 3H), 2.30 (br d, J = 7.0 Hz, 2H), 2.15 (m, 1H),1.97 (m, 2H), 1.72 (m, 1H), 1.55 (m, 1H), 1.26 (m, 1H), 1.02 (m, 1H),0.49 (m, 2H), 0.21 (m, 2H); hLPA₁ IC₅₀ = 572 nM. Example 80(±)-trans-2-[3-({6-[5-({[5-(cyclopropyl-methyl)-1,2,4-oxadiazol-3-yl]amino}methyl)-1-methyl-1H-1,2,3-triazol-4-yl]- 2-methylpyridin-3-yl}oxy)cyclo-pentyl]acetic acid. TFA salt 83

LCMS, (M + H)⁺ = 430; ¹H NMR (500 MHz, DMSO-d₆) δ 7.71 (br d, J = 8.5Hz, 1H), 7.36 (br d, J = 8.5 Hz, 1H), 4.89 (m, 1H), 3.86 (s, 3H), 2.42(m, 1H), 2.33 (s, 3H), 2.25 (br d, J = 7.0 Hz, 2H), 2.13 (m, 1H),1.99-1.91 (m, 2H), 1.86 (s, 1H), 1.68 (m, 1H), 1.53 (m, 1H), 1.25 (m,1H), 1.04 (br s, 1H), 0.58-0.05 (m, 4H); hLPA₁ IC₅₀ = 1230 nM. Example81 (±)-trans-2-[3-{[6-(5-{(cyclopropylmethoxy)carbonyl]amino}-1-methyl-1H-1,2,3-triazol-4-yl)-2-methyl-pyridin-3- yl]oxy}cyclopentyl]acetic acid

Example 84.(±)-Trans-3-(4-(5-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-pyrazol-4-yl)phenoxy)cyclopentane-1-carboxylic Acid

84A. tert-butyl 4-(4-hydroxyphenyl)-1-methyl-1H-pyrazole-5-carboxylate

To a degassed mixture of (4-hydroxyphenyl)boronic acid (58.1 mg, 0.421mmol), tert-butyl 4-bromo-1-methyl-1H-pyrazole-5-carboxylate (100 mg,0.383 mmol) and Cs₂CO₃ (250 mg, 0.766 mmol) in DMF (5 mL) was added(Ph₃P)₄Pd° (44.3 mg, 0.038 mmol), and the reaction mixture was heated at90° C. for 2 h, then was cooled to RT and concentrated in vacuo. Theresidue was partitioned between water and EtOAc (8 mL each); the aqueouslayer was extracted with EtOAc (2×15 mL), dried (Na₂SO₄) andconcentrated in vacuo. The crude product was chromatographed (SiO₂;continuous gradient from 15-20% EtOAc in hexanes) to give the titlecompound (80 mg, 0.289 mmol, 75% yield) as a yellow solid. [M+H]⁺=275.2;¹H NMR (300 MHz, DMSO-d₆) δ 9.43 (s, 1H), 7.51 (s, 1H), 7.15-7.18 (d,J=8.4 Hz, 2H), 6.75-6.78 (d, J=8.4 Hz, 2H), 4.03 (s, 3H), 1.38 (s, 9H).

84B. Tert-butyl4-(4-(((+)-trans-3-(ethoxycarbonyl)cyclopentyl)oxy)phenyl)-1-methyl-1H-pyrazole-5-carboxylate

To a 0° C. solution of compound 84A (500 mg, 1.823 mmol) and(1)-trans-ethyl 3-hydroxy-cyclopentane carboxylate (577 mg, 3.65 mmol)in THE (25 mL) were added Ph₃P (956 mg, 3.65 mmol) and di-tert-butylazodicarboxylate (839 mg, 3.65 mmol). The reaction mixture was heated at50° C. for 16 h, then was cooled to RT and concentrated in vacuo. Theresidue was diluted with water (50 mL) and extracted with EtOAc (2×50mL). The combined organic layers were washed with water (50 mL), brine(50 mL), dried (Na₂SO₄) and concentrated in vacuo. The crude materialwas chromatographed (24 g SiO₂, isocratic 15% EtOAc in petroleum ether)to give the title compound (800 mg) as a gummy liquid. [M+H]⁺=415.2.

84C.4-(4-(((±)-trans-3-(ethoxycarbonyl)cyclopentyl)oxy)phenyl)-1-methyl-1H-pyrazole-5-carboxylicAcid

To a 0° C. solution of compound 84B (0.80 g, 1.93 mmol) in DCM (5 mL)was added TFA (5.0 mL, 64.9 mmol). The reaction mixture was allowed towarm to RT and stirred at RT for 4 days, then was concentrated in vacuo.The residue was triturated with Et₂O (2×25 mL) and dried under vacuum togive the title compound (400 mg, 59% yield) as an off-white solid.[M+H]⁺=359.2; ¹H NMR (300 MHz, DMSO-d₆) δ 7.55 (s, 1H), 7.18-7.35 (d,J=8.7 Hz, 2H), 6.88-6.91 (d, J=8.7 Hz, 2H), 5.91 (m, 1H), 4.00-4.15 (m,5H), 2.95-3.03 (m, 1H), 1.97-2.15 (m, 4H), 1.75-1.85 (m, 2H), 1.19-1.20(t, J=7.2 Hz, 3H).

84D. Ethyl(+)-trans-3-(4-(5-(hydroxymethyl)-1-methyl-1H-pyrazol-4-yl)phenoxy)cyclopentane-1-carboxylate

To a 0° solution of compound 84C (400 mg, 1.116 mmol) in THE (10 mL)were added Et₃N (0.17 mL, 1.23 mmol) and ethyl chloroformate (0.117 mL,1.23 mmol). The reaction mixture was stirred at 0° for 1 h, then wasdiluted with EtOH (10 mL) and re-cooled to 0° C. NaBH₄ (84 mg, 2.23mmol) was added, and the reaction was stirred at RT for 16 h, then wasconcentrated in vacuo. The residue was diluted with water (50 mL) andextracted with EtOAc (2×50 mL). The combined organic layers were washedwith water (50 mL), brine (50 mL), dried (Na₂SO₄) and concentrated invacuo. The crude material was chromatographed (12 g SiO₂; continuousgradient from 15-30% EtOAc in petroleum ether) to give the titlecompound (50 mg, 13% yield) as an off white solid. [M+H]⁺=345.2; ¹H NMR(300 MHz, DMSO-d₆) δ 7.51 (s, 1H), 7.35-7.38 (d, J=9 Hz, 2H), 6.95-6.92(d, J=9.2 Hz, 2H), 5.33 (t, J=5.4 Hz, 1H), 4.88-4.95 (m, 1H), 4.49-4.51(m, 2H), 4.00-4.15 (m, 2H), 3.86 (s, 3H), 2.95-3.03 (m, 1H), 1.97-2.15(m, 4H), 1.75-1.85 (m, 2H), 1.19-1.23 (t, J=7.0 Hz, 3H).

84E. Ethyl(±)-trans-3-(4-(5-(((cyclopentylcarbamoyl)oxy)methyl)-1-methyl-1H-pyrazol-4-yl)phenoxy)cyclopentane-1-carboxylate

To a solution of compound 84D (50 mg, 0.145 mmol) andcyclopentanecarboxylic acid (33.1 mg, 0.290 mmol) in toluene (2 mL) weresuccessively added TEA (0.040 mL, 0.290 mmol) and (PhO)₂PON₃ (0.038 mL,0.174 mmol). The reaction mixture was heated at 110° C. for 16 h, thenwas cooled to RT and concentrated in vacuo. The crude product waschromatographed (4 g SiO₂; isocratic at 25% EtOAc in petroleum ether) togive the title compound (40 mg, 60% yield) as an off-white solid.[M+H]⁺=456.4; ¹H NMR (300 MHz, DMSO-d₆) δ 7.58 (s, 1H), 7.31-7.34 (m,2H), 6.93-7.96 (m, 2H), 5.08 (s, 1H), 4.92-4.98 (s, 1H), 4.06-4.08 (q,J=7.0 Hz, 2H), 3.87 (s, 3H), 3.81-3.82 (m, 3H), 2.95-3.05 (m, 1H),1.15-2.15 (m, 17H).

84F. (±)-Trans-ethyl3-(4-(5-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-1-methyl-1H-pyrazol-4-yl)phenoxy)cyclopentanecarboxylate

To a 0° C. solution of compound 84E (40 mg, 0.088 mmol) in DMF (2 mL),was added NaH (5.3 mg, 0.13 mmol). The reaction mixture was stirred at0° C. for 10 min, after which Mel (11 μL, 0.176 mmol) was added. Thereaction mixture was allowed to warm to RT and stirred at RT for 2 h,then was quenched with ice-cold water (5 mL) and extracted with EtOAc(2×10 mL). The combined organic layers were washed with water (10 mL),brine (10 mL), dried (Na₂SO₄) and concentrated in vacuo to give thetitle compound (7 mg, 18% yield) as an off white solid. [M+H]⁺=470.2.

Example 84

To a 0° C. solution of compound 84F (40 mg, 0.09 mmol) in THE (1 mL) &MeOH (1 mL) was added a solution of LiOH.H₂O (10.7 mg, 0.256 mmol) inwater (0.5 mL). The reaction mixture was stirred at RT for 5 h, then wasdiluted with water (5 mL) and washed with Et₂O (2×10 mL). The aqueouslayer was acidified with 1.5N aq. HCl and extracted with DCM (2×10 mL);the combined organic layers were dried (Na₂SO₄) and concentrated invacuo. The crude material was purified by reverse phase preparative HPLC(Column: KINETICS BIPHENY (250×21.2×5 μm); M.Phase A: 0.1% TFA in H₂O.M.Phase B: MeOH; Flow: 16 mL/min; Time (min)/% B: 0/90(90 min)) to givethe title compound (7 mg, 18% yield) as an off-white solid.[M+H]⁺=442.2; ¹H NMR (300 MHz, MeOH-d₄) δ 7.58 (s, 1H), 7.30-7.40 (m,2H), 6.90-7.00 (m, 2H), 5.26 (s, 2H), 4.92-4.98 (m, 1H), 4.23-4.67 (m,1H), 3.97 (s, 3H), 3.03-3.10 (m, 1H), 2.79 (s, 3H), 2.07-2.25 (m, 4H),1.85-2.04 (m, 2H), 1.62-1.72 (m, 4H), 1.48-1.60 (m, 4H).

Example 85.(±)-Cis-2-(2-((6-(4-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-3-methylisoxazol-5-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)aceticAcid

Example 85A. (±)-Trans-ethyl 2-(2-hydroxycyclopentyl)acetate

To a solution of ethyl 2-(2-oxocyclopentyl)acetate (1.0 g, 5.88 mmol) inEtOH (20 mL) at RT was added NaBH₄ (0.222 g, 5.88 mmol) and the solutionwas stirred at RT for 1 h. The reaction mixture was diluted with H₂O,then was carefully acidified with 1N aq. HCl and extracted with EtOAc(2×). The combined organic extracts were washed with H₂O, brine, dried(MgSO₄), and concentrated in vacuo. The residue was chromatographed(SiO₂; continuous gradient from 25-75% EtOAc in hexanes) to give thetitle compound (741 mg, 73% yield) as an oil. ¹H NMR (500 MHz, CDCl₃) δ4.15 (q, J=7.2 Hz, 2H), 3.87 (m, 1H), 2.87 (d, J=2.8 Hz, 1H), 2.46 (dd,J=16.2, 5.8 Hz, 1H), 2.38 (dd, J=16.2, 8.8 Hz, 1H), 2.13-2.03 (m, 1H),2.01-1.92 (m, 2H), 1.78-1.67 (m, 2H), 1.63-1.56 (m, 2H), 1.27 (t, J=7.2Hz, 3H).

Example 85B. (±)-Cis-ethyl2-(2-((6-(4-(((cyclopentyl(methyl)carbamoyl)oxy)methyl)-3-methylisoxazol-5-yl)-2-methylpyridin-3-yl)oxy)cyclopentyl)acetate

To a RT solution of compound 8J (30 mg, 0.087 mmol), Example 85A (27 mg,0.16 mmol) and Ph₃P (41 mg, 0.16 mmol) in THE (1 mL) was added DEAD (68mg, 0.16 mmol, 40% in toluene). The reaction mixture was stirred at RTfor 48 h, then was concentrated in vacuo. The residue waschromatographed (SiO₂; continuous gradient from 15-60% EtOAc in hexanes)to give the slightly impure title compound (49 mg, 113% yield) as awhite solid. LC-MS, [M+H]⁺=500.

Example 85

To a solution of Example 85B (43 mg, 0.086 mmol) in MeOH/THF (0.75 mLeach) was added aq. 2M LiOH (0.75 mL, 1.5 mmol). The reaction was heatedat 50° C. for 1 h, then was cooled to RT, diluted with H₂O, acidifiedwith 1N aq. HCl to pH ˜4 and extracted with EtOAc (2×). The combinedorganic extracts were washed with H₂O, brine, dried (MgSO₄), andconcentrated in vacuo. The residue was purified by preparative LC/MSusing the following conditions: Column: XBridge C18, 19×200 mm, 5 μmparticles; Mobile Phase A: 5:95 MeCN:H₂O with 10 mM aq. NH₄OAc; MobilePhase B: 95:5 MeCN:H₂O with 10 mM aq. NH₄OAc; Gradient: 30-70% B over 19min, then a 5 min hold at 100% B; Flow: 20 mL/min. to give the titlecompound (34 mg, 84% yield. LCMS, (M+H)⁺=472. ¹H NMR (500 MHz, DMSO-d₆)δ 7.70 (d, J=8.5 Hz, 1H), 7.45 (d, J=8.7 Hz, 1H), 5.35 (s, 2H), 4.86 (m,1H), 2.65 (br s, 3H), 2.58 (m, 1H), 2.44 (m, 1H), 2.38 (s, 3H), 2.35 (m,1H), 2.30 (s, 3H), 2.06 (m, 1H), 1.93-1.85 (m, 1H), 1.77-1.38 (m, 12H);hLPA₁ IC₅₀=29 nM.

The examples in the following table were synthesized according to themethods and procedures described for the synthesis of Example 4 andExample 1C in WO 2017/223016, except that 2,5-dibromo-6-ethyl-pyridinewas used in the first step of the synthesis instead of2,5-dibromo-6-methylpyridine.

Ex # Structure & Name Analytical & Biology Data Method 86

  (±)-2-((trans)-3-((6-(5-(((butyl LCMS, [M + H]+ = 474.0; ¹H NMR (500MHz, DMSO- d₆) δ 7.83 (br d, J = 8.2 Hz, 1H), 7.39 (br d, J = 8.5 Hz,1H), 5.63 (br s, 2H), 4.91 (br s, 1H), 4.09 (s, 3H), 3.23- 3.12 (m, 1H),3.04 (br s, 1H), 2.78-2.69 (m, 5H), 2.48- 2.34 (m, 1H), 2.28 (br d, J =6.7 Hz, 2H), 2.20-2.05 (m, 1H), 1.95 (br s, 2H), 1.80-1.65 (m, 1H),1.61-1.46 (m, 1H), 1.41 (br s, 1H), 1.30-1.14 (m, 5H), 1.00 (br d, J =6.1 Hz, 2H), 0.86 (br s, 2H), 0.64 (br s, 2H); hLPA₁ IC₅₀ = 48 nM.Example 4 (methyl)carbamoyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2- ethylpyridin-3-yl)oxy)cyclopentyl)acetic acid 87

LCMS, [M + H]+ = 486.4; ¹H NMR (500 MHz, DMSO- d₆) δ 7.82 (br d, J = 8.2Hz, 1H), 7.38 (br d, J = 8.5 Hz, 1H), 5.62 (br d, J = 14.3 Hz, 2H), 4.91(br s, 1H), 4.09 (br s, 3H), 3.19 (br d, J = 18.0 Hz, 1H), 3.06 (br s,1H), 2.77- 2.67 (m, 4H), 2.48-2.34 (m, 2H), 2.27 (br d, J = 6.7 Hz, 3H),2.14 (br d, J = 4.9 Hz, 1H), 1.94 (br s, 2H), 1.89 (br s, 1H), 1.78 (brs, 1H), 1.70 (br s, 2H), 1.63 (br s, 2H), 1.60-1.46 (m, 2H), 1.39 (br s,1H), 1.30-1.13 (m, 4H); hLPA₁ IC₅₀ = 46 nM. Example 4(±)-2-((trans)-3-((6-(5-((((cyclo-butyl methyl)(methyl)carba-moyl)oxy)methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-ethyl-pyridin-3-yl)oxy) cyclopentyl)acetic acid

The examples in the following table were synthesized according to themethods and procedures described for the synthesis of Example 85, butusing triazole intermediates which were synthesized in an analogousfashion to Example 6E.

Ex # Structure & Name Analytical & Biology Data Method 88

[M + H]⁺ = 446.1; ¹H NMR (500 MHz, DMSO- d₆) δ 7.82 (br d, J = 7.2 Hz,1H), 7.39 (br d, J = 8.6 Hz, 1H), 5.63 (br d, J = 14.9 Hz, 2H), 4.81 (brs, 1H), 4.09 (s, 3H), 3.16 (br dd, J = 12.2, 5.7 Hz, 1H), 3.10- 2.98 (m,1H), 2.84-2.70 (m, 3H), 2.46-2.32 (m, 6H), 2.04 (br dd, J = 14.3, 7.4Hz, 1H), 1.93-1.84 (m, 1H), 1.80- 1.19 (m, 7H), 0.87-0.76 (m, 1H),0.67-0.60 (m, 1H); hLPA₁ IC₅₀ = 425 nM. Example 85(±)-cis-2-(2-((2-methyl-6-(1-methyl-5-(((methyl(propyl)carbamoyl)oxy)methyl)-1H-1,2,3-triazol-4-yl)pyridin-3-yl) oxy)cyclopentyl)acetic acid 89

[M + H]⁺ = 458.1; ¹H NMR (500 MHz, DMSO- d₆) δ 7.83 (br d, J = 8.2 Hz,1H), 7.41 (br d, J = 7.6 Hz, 1H), 5.63 (br d, J = 18.3 Hz, 2H),4.93-4.74 (m, 1H), 4.10 (s, 3H), 3.09 (br d, J = 2.4 Hz, 1H), 2.96 (brd, J = 3.4 Hz, 1H), 2.89-2.74 (m, 3H), 2.49- 2.28 (m, 5H), 2.11-1.83 (m,2H), 1.80-1.46 (m, 4H), 1.02-0.69 (m, 1H), 0.50 to- 0.08 (m, 4H); hLPA₁IC₅₀ = 291 nM. Example 85 (±)-cis-2-(2-((6-(5-((((cyclopropyl-methyl)(methyl)carbamoyl)oxy) methyl)-1-methyl-1H-1,2,3-triazol-4-yl)-2-methylpyridin-3-yl)oxy) cyclopentyl)acetic acid

1. A compound of Formula (I):

or a stereoisomer, tautomer, or pharmaceutically acceptable salt orsolvate thereof, wherein: X¹, X², X³, and X⁴ are each independently CR⁶or N; provided that no more than two of X¹, X², X³, or X⁴ are N; Q¹, Q²,and Q³ are independently N, O, NR^(5a), or CR^(5b), and the dashedcircle denotes bonds forming an aromatic ring; provided that at leastone of Q¹, Q², and Q³ is not CR^(5b); L is independently a covalent bondor C₁₋₄ alkylene substituted with 0 to 4 R⁹; W is independently O,—OCH₂— or —CH₂O—; Y¹ is independently O or NR⁷; Y² is independent

Y³ is independently OR⁴, NR⁸R⁴ or

with the proviso that when Y¹ is O, then Y³ is not OR⁴; Y⁵ independentlyis O or NH; alternatively, —Y²—Y³ is R^(4b); R¹ is independently cyano,—C(O)OR¹¹, —C(O)NR^(12a)R^(12b),

R² is each independently halo, cyano, hydroxyl, amino, C₁₋₄ alkoxy, C₁₋₄haloalkyl, C₁₋₄ haloalkoxy, C₁₋₄ alkylamino, —(CH₂)₀₋₁—(C₃₋₆cycloalkyl), —(CH₂)₀₋₁-phenyl, or C₁₋₆ alkyl substituted with 0 to 3R^(c); R^(3a) is independently hydrogen, halo, hydroxyl, or C₁₋₄ alkyl;R^(3b) is independently hydrogen, halo, cyano, hydroxyl, amino, C₁₋₄alkyl, C₁₋₄ haloalkyl, C₁₋₄ alkoxy, C₁₋₄ haloalkoxy or C₁₋₆ alkylsubstituted with 0 to 2 R^(a); or alternatively, R^(3a) and R^(3b)together, with the carbon atom they are attached to, form a C₃₋₄carbocyclyl; R⁴ is -L₁-R^(4a); L₁ is independently a covalent bond orC₁₋₄ alkylene substituted with 0 to 4 R⁹; R^(4a) is independently C₁₋₁₀alkyl, C₁₋₁₀ haloalkyl, C₁₋₁₀ alkenyl, C₃₋₈ cycloalkyl, C₆₋₁₀ aryl, 3 to8-membered heterocyclyl, 5 to 6-membered heteroaryl; wherein each of thealkyl, alkenyl, alkylene, cycloalkyl, aryl, heterocyclyl, andheteroaryl, by itself or as part of other moiety, is independentlysubstituted with 0 to 3 R¹⁰; R^(4b) is independently C₁₋₁₀ alkyl, C₁₋₁₀haloalkyl, C₁₋₁₀ alkenyl, C₃₋₈ cycloalkyl, C₆₋₁₀ aryl, 3 to 8-memberedheterocyclyl, 5 to 6-membered heteroaryl; wherein each of the alkyl,alkenyl, alkylene, cycloalkyl, aryl, heterocyclyl, and heteroaryl, byitself or as part of other moiety, is independently substituted with 0to 3 R^(10a); R^(5a) is independently hydrogen, C₁₋₄ haloalkyl,—(CH₂)₀₋₁—(C₃₋₆ cycloalkyl), —(CH₂)₀₋₁-phenyl, or C₁₋₆ alkyl substitutedwith 0 to 3 R^(a); R^(5b) is independently hydrogen, halo, cyano,hydroxyl, amino, C₁₋₄ alkoxy, C₁₋₄ haloalkyl, C₁₋₄ haloalkoxy, C₁₋₄alkylamino, —(CH₂)₀₋₁—(C₃₋₆ cycloalkyl), —(CH₂)₀₋₁-phenyl, or C₁₋₆ alkylsubstituted with 0 to 3 R^(b); R⁶ is each independently hydrogen, halo,cyano, hydroxyl, amino, C₁₋₄ alkylamino, C₁₋₄ haloalkyl, C₁₋₄ alkoxy,C₁₋₄ haloalkoxy or C₁₋₆ alkyl substituted with 0 to 1 R^(b); R⁷ and R⁸are each independently hydrogen, C₁₋₆ alkyl, C₁₋₄haloalkyl, C₃₋₆cycloalkyl or C₁₋₆ alkyl substituted with 0 to 1 R^(c); R⁹ is eachindependently halo, oxo, cyano, hydroxyl, amino, C₁₋₄ haloalkyl, C₁₋₄alkoxy, C₁₋₄ haloalkoxy, C₃₋₆ cycloalkyl, or C₁₋₆ alkyl substituted with0 to 3 R^(a); R¹⁰ and R^(10a) are each independently halo, hydroxyl,amino, cyano, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₄ alkylamino, C₁₋₄haloalkyl, C₁₋₄ alkoxy, C₁₋₄ haloalkoxy, phenyl, or 5 to 6 memberedheteroaryl, C₁₋₆ alkyl substituted with 0 to 3 R^(b); R¹¹, R^(12a) andR^(12b) are each independently hydrogen, C₁₋₆ alkyl, C₃₋₆ cycloalkyl orbenzyl; R^(a) is independently halo, cyano, hydroxyl, C₁₋₄ alkoxy, C₁₋₄haloalkyl, or C₁₋₄ haloalkoxy; R^(b) is independently halo, cyano,hydroxyl, amino, C₁₋₄ alkoxy, C₁₋₄ haloalkyl, or C₁₋₄ haloalkoxy; R^(e)is independently C₁₋₄ haloalkyl, C₃₋₆ cycloalkyl, or C₁₋₆ alkylsubstituted with 0 to 3 R^(a); m is an integer of 0, 1, or 2; and q isan integer of 0, 1, or
 2. 2. The compound according to claim 1, wherein:the

moiety is independently

* denotes the attachment point to L; and R^(5a) and R^(5b) are the sameas defined in claim
 1. 3. The compound according to claim 2, wherein:the

moiety is independently —OR^(4b), —NR⁷R^(4b),


4. The compound according to claim 3, wherein L is a covalent bond orC₁₋₂ alkylene.
 5. The compound according to claim 4, wherein: R^(3a) andR^(3b) are independently hydrogen or C₁₋₄ alkyl; or alternatively,R^(3a) and R^(3b) together, with the carbon atom they are attached to,form C₃₋₄ cycloalkyl.
 6. The compound according to claim 5, wherein R¹is CO₂H.
 7. The compound according to claim 6, wherein: X¹, X², X³, andX⁴ are independently CR⁶; or X¹, X² and X³ are CR⁶ and X⁴ is N; or X²and X³ are CR⁶ and X¹ and X⁴ are N; or X¹ and X² are CR⁶ and X³ and X⁴are N; and R⁶ is independently hydrogen, halo, hydroxyl, C₁₋₆ alkyl,C₁₋₄ haloalkyl, or C₁₋₄ alkoxy.
 8. The compound according to claim 7,wherein: X¹, X², X³, and X⁴ are independently CR⁶; or X¹, X² and X³ areCR⁶ and X⁴ is N; or X² and X³ are CR⁶ and X¹ and X⁴ are N; the

moiety is independently

* denotes the attachment point to L; L is independently a covalent bondor —CH₂—; W is independently O or —OCH₂—; the

moiety is independently —NR⁷R^(4b),

R² is each independently halo, cyano, hydroxyl, C₁₋₄ alkoxy, C₁₋₄haloalkyl or C₁₋₄ haloalkoxy; R⁴ is independently C3-6 alkyl,—(CH₂)₀₋₁—C₃₋₆ cycloalkyl, —(CH(C₁₋₂ alkyl))-C₃₋₆ cycloalkyl,—(CH₂)₀₋₁-phenyl or —(CH(C₁₋₂ alkyl))-phenyl, wherein each of saidcycloalkyl and phenyl is independently substituted with 0 to 3 R¹⁰;R^(4b) is independently 5 to 6-membered heteroaryl substituted with 0 to2 R^(10a); R^(5a) is independently C₁₋₆ alkyl, or —(CH₂)₀₋₁—(C₃₋₆cycloalkyl); R^(5b) is independently hydrogen, halo, cyano, hydroxyl,C₁₋₄ alkyl, C₁₋₄ alkoxy, C₁₋₄ haloalkyl, C₁₋₄ haloalkoxy, or—(CH₂)₀₋₁—(C₃₋₆ cycloalkyl); R⁶ is each independently hydrogen, halo,hydroxyl, C₁₋₆ alkyl, C₁₋₄ haloalkyl, or C₁₋₄ alkoxy; R⁷ and R⁸ are eachindependently hydrogen or C₁₋₂ alkyl; R¹⁰ is each independently halo,cyano, hydroxyl, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₁₋₆ alkoxy, or C₁₋₆haloalkoxy; R^(10a) is each independently halo, cyano, hydroxyl, C₁₋₆alkyl, C₁₋₆ haloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, —(CH₂)₀₋₃—C₃₋₆cycloalkyl, phenyl or 5 to 6 membered heteroaryl; m is 0 or 1; and q is0 or
 1. 9. The compound according to claim 8, wherein: the

moiety is independently

* denotes the attachment point to L; L is independently a covalent bondor —CH₂—; W is independently O or —OCH₂—; the

moiety is independently —NR⁷R^(4b),

R^(3a) and R^(3b) are each independently hydrogen or C₁₋₄ alkyl; oralternatively, R^(3a) and R^(3b) together, with the carbon atom they areattached to, form C₃₋₄ cycloalkyl; R⁴ is independently C₃₋₆ alkyl,—(CH₂)₀₋₁—C₃₋₆ cycloalkyl, —(CH₂)-phenyl, or —(CH(CH₃))-phenyl; whereinwherein each of said alkyl, cycloalkyl and phenyl is independentlysubstituted with 0 to 2 R¹⁰; R^(4b) is independently

R⁶ is independently hydrogen, halo or C₁₋₄ alkyl; R⁷ and R⁸ are eachindependently hydrogen or C1-2 alkyl; R¹⁰ is each independently halo orC1-4 alkyl; and R^(10a) is independently C₁₋₄ alkyl, —(CH₂)₁₋₃—C₃₋₆cycloalkyl, phenyl or pyridyl.
 10. A compound of Formula (II):

or a stereoisomer, tautomer, or pharmaceutically acceptable salt orsolvate thereof, wherein: X⁴ is CH or N; the

moiety is independently

* denotes the attachment point to L; L is independently a covalent bondor —CH₂—; W is independently O or —OCH₂—; the

moiety is independently —NR⁷R^(4b),

R^(3a) and R^(3b) are each independently hydrogen or methyl; oralternatively, R^(3a) and R^(3b) together, with the carbon atom they areattached to, form cyclopropyl; R⁴ is independently C₃₋₆ alkyl,—(CH₂)₀₋₁—C₃₋₆ cycloalkyl, —(CH₂)-phenyl, or —(CH(CH₃))-phenyl; R^(4b)is independently

R⁶ is independently hydrogen, halo or C₁₋₄ alkyl; R⁷ and R⁸ are eachindependently hydrogen or methyl; R^(10a) is independently C₁₋₄ alkyl,phenyl or pyridyl; and m is 0 or
 1. 11. The compound according to claim1, which is selected from any one of Examples 1 to 89, or astereoisomer, a tautomer, or a pharmaceutically acceptable salt orsolvate thereof.
 12. A pharmaceutical composition comprising one or morecompounds according to claim 1, or a stereoisomer, tautomer, orpharmaceutically acceptable salt or solvate thereof; and apharmaceutically acceptable carrier or diluent.
 13. (canceled)
 14. Amethod of treating a disease, disorder, or condition associated withdysregulation of lysophosphatidic acid receptor 1 (LPA₁) in a patienthaving the disease, disorder, or condition, comprising administering atherapeutically effective amount Use of a compound or a stereoisomer,tautomer, or pharmaceutically acceptable salt or solvate thereofaccording to claim
 1. 15. The method according to claim 14, wherein thedisease, disorder, or condition is related to pathological fibrosis,transplant rejection, cancer, osteoporosis, or inflammatory disorders.16. The method according to claim 15, wherein the pathological fibrosisis pulmonary, liver, renal, cardiac, dernal, ocular, or pancreaticfibrosis.
 17. The use method according to claim 14, wherein the disease,disorder, or condition is idiopathic pulmonary fibrosis (IPF),non-alcoholic steatohepatitis (NASH), non-alcoholic fatty liver disease(NAFLD), chronic kidney disease, diabetic kidney disease, and systemicsclerosis.
 18. The method according to claim 15, wherein the cancer isof the bladder, blood, bone, brain, breast, central nervous system,cervix, colon, endometrium, esophagus, gall bladder, genitalia,genitourinary tract, head, kidney, larynx, liver, lung, muscle tissue,neck, oral or nasal mucosa, ovary, pancreas, prostate, skin, spleen,small intestine, large intestine, stomach, testicle, or thyroid.
 19. Amethod of treating fibrosis in a mammal having fibrosis, comprisingadministering a therapeutically effective amount of a compound or astereoisomer, tautomer, or pharmaceutically acceptable salt or solvatethereof according to claim
 1. 20. The method according to claim 19,wherein the fibrosis is idiopathic pulmonary fibrosis (IPF),nonalcoholic steatohepatitis (NASH), chronic kidney disease, diabetickidney disease, and systemic sclerosis.
 21. A method of treating adisease, disorder, or condition selected from: treating lung fibrosis(idiopathic pulmonary fibrosis), asthma, chronic obstructive pulmonarydisease (COPD), renal fibrosis, acute kidney injury, chronic kidneydisease, liver fibrosis (non-alcoholic steatohepatitis), skin fibrosis,fibrosis of the gut, breast cancer, pancreatic cancer, ovarian cancer,prostate cancer, glioblastoma, bone cancer, colon cancer, bowel cancer,head and neck cancer, melanoma, multiple myeloma, chronic lymphocyticleukemia, cancer pain, tumor metastasis, transplant organ rejection,scleroderma, ocular fibrosis, age related macular degeneration (AMD),diabetic retinopathy, collagen vascular disease, atherosclerosis,Raynaud's phenomenon, or neuropathic pain in a mammal having thedisease, disorder, or condition, comprising administering atherapeutically effective amount of a compound or a stereoisomer, atautomer, or a pharmaceutically acceptable salt or solvate thereofaccording to claim 1, to the mammal.